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Title: Nonreciprocity of backward volume spin wave beams excited by the curved focusing transducer

Abstract

The focusing effect for spin waves excited by a curved micrometer-sized coplanar waveguide transducer on top of a 5-μm-thick epitaxial yttrium iron garnet film is studied by means of the micro-focused Mandelstam-Brillouin light scattering technique and micromagnetic simulations. The curvilinear transducer is designed to focus the backward volume spin waves on the in-plane bias magnetic field applied along the symmetry axis of the transducer. We show that two-dimensional maps of spin wave intensity exhibit nonreciprocal properties without mirror symmetry with respect to the magnetic field direction and the focusing effect. The observed effects are the consequence of nonreciprocity of the backward volume spin waves travelling at an angle toward the bias field direction.

Authors:
 [1];  [2]; ORCiD logo [3];  [2]; ORCiD logo [2]; ORCiD logo [2];  [4]; ORCiD logo [5]; ORCiD logo [3]
  1. Univ. of Perugia, Perugia (Italy). Dep. of Physics and Geology
  2. Russian Academy of Sciences (RAS), Saratov (Russian Federation). Inst. of Radioengineering and Electronics (IRE)
  3. Russian Academy of Sciences (RAS), Saratov (Russian Federation). Inst. of Radioengineering and Electronics (IRE); Saratov State Univ. (Russian Federation)
  4. Saratov State Univ. (Russian Federation)
  5. Univ. of California, Riverside, CA (United States)
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Spins and Heat in Nanoscale Electronic Systems (SHINES); Univ. of California, Riverside, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); Russian Science Foundation
OSTI Identifier:
1566653
Alternate Identifier(s):
OSTI ID: 1477208
Grant/Contract Number:  
SC0012670; 17-19-01673; 16-07- 01092
Resource Type:
Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 113; Journal Issue: 15; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; phonons; thermal conductivity; thermoelectric; spin dynamics; spintronics

Citation Formats

Madami, M., Khivintsev, Y., Gubbiotti, G., Dudko, G., Kozhevnikov, A., Sakharov, V., Stal'makhov, A., Khitun, A., and Filimonov, Y. Nonreciprocity of backward volume spin wave beams excited by the curved focusing transducer. United States: N. p., 2018. Web. doi:10.1063/1.5050347.
Madami, M., Khivintsev, Y., Gubbiotti, G., Dudko, G., Kozhevnikov, A., Sakharov, V., Stal'makhov, A., Khitun, A., & Filimonov, Y. Nonreciprocity of backward volume spin wave beams excited by the curved focusing transducer. United States. doi:10.1063/1.5050347.
Madami, M., Khivintsev, Y., Gubbiotti, G., Dudko, G., Kozhevnikov, A., Sakharov, V., Stal'makhov, A., Khitun, A., and Filimonov, Y. Fri . "Nonreciprocity of backward volume spin wave beams excited by the curved focusing transducer". United States. doi:10.1063/1.5050347. https://www.osti.gov/servlets/purl/1566653.
@article{osti_1566653,
title = {Nonreciprocity of backward volume spin wave beams excited by the curved focusing transducer},
author = {Madami, M. and Khivintsev, Y. and Gubbiotti, G. and Dudko, G. and Kozhevnikov, A. and Sakharov, V. and Stal'makhov, A. and Khitun, A. and Filimonov, Y.},
abstractNote = {The focusing effect for spin waves excited by a curved micrometer-sized coplanar waveguide transducer on top of a 5-μm-thick epitaxial yttrium iron garnet film is studied by means of the micro-focused Mandelstam-Brillouin light scattering technique and micromagnetic simulations. The curvilinear transducer is designed to focus the backward volume spin waves on the in-plane bias magnetic field applied along the symmetry axis of the transducer. We show that two-dimensional maps of spin wave intensity exhibit nonreciprocal properties without mirror symmetry with respect to the magnetic field direction and the focusing effect. The observed effects are the consequence of nonreciprocity of the backward volume spin waves travelling at an angle toward the bias field direction.},
doi = {10.1063/1.5050347},
journal = {Applied Physics Letters},
number = 15,
volume = 113,
place = {United States},
year = {2018},
month = {10}
}

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Chiang, H.; Bhowmick, T.</span> </li> <li> Journal of Magnetism and Magnetic Materials, Vol. 428</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1016/j.jmmm.2016.12.022" class="text-muted" target="_blank" rel="noopener noreferrer">10.1016/j.jmmm.2016.12.022<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1109/LMAG.2015.2501278" target="_blank" rel="noopener noreferrer" class="name">Magnonic Holographic Read-Only Memory<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="2016-01-01">January 2016</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Gertz, Frederick; Kozhevnikov, Alexander; Filimonov, Yuri</span> </li> <li> IEEE Magnetics Letters, Vol. 7</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1109/LMAG.2015.2501278" class="text-muted" target="_blank" rel="noopener noreferrer">10.1109/LMAG.2015.2501278<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> </div> <div class="pagination-container small"> <a class="pure-button prev page" href="#" rel="prev"><span class="fa fa-angle-left"></span></a><ul class="pagination d-inline-block" style="padding-left:.2em;"></ul><a class="pure-button next page" href="#" rel="next"><span class="fa fa-angle-right"></span></a> </div> </div> </div> <div class="col-sm-3 order-sm-3"> <ul class="nav nav-stacked"> <li class="active"><a href="" class="reference-type-filter tab-nav" data-tab="biblio-references" data-filter="type" data-pattern="*"><span class="fa fa-angle-right"></span> All References</a></li> <li class="small" style="margin-left:.75em; 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float:none;">[ × clear filter / sort ]</a> </div> </form> </div> </div> </div> </section> <section id="biblio-related" class="tab-content tab-content-sec " data-tab="biblio"> <div class="row"> <div class="col-sm-9 order-sm-9"> <section id="biblio-similar" class="tab-content tab-content-sec active" data-tab="related"> <div class="padding"> <p class="lead text-muted" style="font-size: 18px; margin-top:0px;">Similar Records in DOE PAGES and OSTI.GOV collections:</p> <aside> <ul class="item-list" itemscope itemtype="http://schema.org/ItemList" style="padding-left:0; list-style-type: none;"> <li> <div class="article item document" itemprop="itemListElement" itemscope itemtype="http://schema.org/WebPage"><meta itemprop="position" content="1" /><div class="item-info"> <h2 class="title" itemprop="name headline"><a href="/pages/biblio/1650221-boosting-optical-nonreciprocity-surface-reconstruction-iron-garnets" itemprop="url">Boosting optical nonreciprocity: surface reconstruction in iron garnets</a></h2> <div class="metadata"> <small class="text-muted" style="text-transform:uppercase;display:block;line-height:2.5em;">Journal Article</small><span class="authors"> <span class="author">Dash, Sushree S.</span> ; <span class="author">Mukherjee, Pinaki</span> ; <span class="author">Haskel, Daniel</span> ; <span class="author">...</span> <span class="text-muted pubdata"> - Optica</span> </span> </div> <div class="abstract">Bi-substituted iron garnet films are extensively used in the fabrication of nonreciprocal devices in optical telecommunications. The miniaturization of these devices for on-chip integration requires the development of more efficient magneto-optic materials than presently available. Recent evidence has emerged of large nearsurface enhancements in the magneto-optic response in these materials. However, their operative mechanisms at the atomic and electronic levels are not as yet understood. We report significant differences in the ionic structure between surface and bulk in bismuth-substituted iron garnet materials. It is found that the unit cell is elongated normal to the surface, thus enlarging the separation between<a href='#' onclick='$(this).hide().next().show().next().show();return false;' style='margin-left:10px;'>more »</a><span style='display:none;'> Fe<sup>3+</sup> ions. These ions play a central role in the magneto-optic response of this material. A marked displacement of Fe ions creates gaps at the surface that are populated in the bulk. Concomitantly, surface- and bulksensitive measurements of spin-polarized 3d Fe<sup>3+</sup> states show significant differences in the magnitude of L<sub>2</sub> edge xray magnetic circular dichroism, as well as differences in L<sub>3</sub> edge dichroism which in the presence of spin-orbit coupling in 3d states can be assigned to high-energy states. An increase in magnetic circular dichroism correlates with larger Faraday rotation. These findings provide a deeper understanding of the role of the surface in the electronic transitions to excited Fe<sup>3+</sup> 3d states, responsible for these nonreciprocal phenomena. Together with the surface reconstruction underlying these effects reported here, they provide a useful tool for the further development of improved materials technologies to advance the integration of nonreciprocal devices in optical circuits.</span><a href='#' onclick='$(this).hide().prev().hide().prev().show();return false;' style='margin-left:10px;display:none;'>« less</a></div><div class="metadata-links small clearfix text-muted" style="margin-top:15px;"> <div class="pure-menu pure-menu-horizontal pull-right" style="width:unset;"> <ul class="pure-menu-list"> <li class="pure-menu-item"><span class="item-info-ftlink">DOI: <a class="misc doi-link " href="https://doi.org/10.1364/OPTICA.398732" target="_blank" rel="noopener" title="Link to document DOI" data-ostiid="1650221" data-product-type="Journal Article" data-product-subtype="PA" >10.1364/OPTICA.398732</a></span></li> </ul> </div> </div> </div> <div class="clearfix"></div> </div> </li> <li> <div class="article item document" itemprop="itemListElement" itemscope itemtype="http://schema.org/WebPage"><meta itemprop="position" content="3" /><div class="item-info"> <h2 class="title" itemprop="name headline"><a href="/biblio/22399045-magnonic-beam-splitter-building-block-parallel-magnonic-circuitry" itemprop="url">Magnonic beam splitter: The building block of parallel magnonic circuitry</a></h2> <div class="metadata"> <small class="text-muted" style="text-transform:uppercase;display:block;line-height:2.5em;">Journal Article</small><span class="authors"> <span class="author">Sadovnikov, A. V.</span> ; <span class="author">Grishin, S. V., E-mail: grishfam@sgu.ru</span> ; <span class="author">Romanenko, D. V.</span> ; <span class="author">...</span> <span class="text-muted pubdata"> - Applied Physics Letters</span> </span> </div> <div class="abstract">We demonstrate a magnonic beam splitter that works by inter-converting magnetostatic surface and backward-volume spin waves propagating in orthogonal sections of a T-shaped yttrium iron garnet structure. The inter-conversion is enabled by the overlap of the surface and volume spin wave bands. This overlap results from the demagnetising field induced along the transversely magnetised section(-s) of the structure and the quantization of the transverse wave number of the propagating spin waves (which are therefore better described as waveguide modes). In agreement with numerical micromagnetic simulations, our Brillouin light scattering imaging experiments reveal that, depending on the frequency, the incident fundamental<a href='#' onclick='$(this).hide().next().show().next().show();return false;' style='margin-left:10px;'>more »</a><span style='display:none;'> waveguide magnonic modes may also be converted into higher order waveguide modes. The magnonic beam splitter demonstrated here is an important step towards the development of parallel logic circuitry of magnonics.</span><a href='#' onclick='$(this).hide().prev().hide().prev().show();return false;' style='margin-left:10px;display:none;'>« less</a></div><div class="metadata-links small clearfix text-muted" style="margin-top:15px;"> <div class="pure-menu pure-menu-horizontal pull-right" style="width:unset;"> <ul class="pure-menu-list"> <li class="pure-menu-item"><span class="item-info-ftlink">DOI: <a class="misc doi-link " href="https://doi.org/10.1063/1.4921206" target="_blank" rel="noopener" title="Link to document DOI" data-ostiid="22399045" data-product-type="Journal Article" data-product-subtype="AC" >10.1063/1.4921206</a></span></li> </ul> </div> </div> </div> <div class="clearfix"></div> </div> </li> <li> <div class="article item document" itemprop="itemListElement" itemscope itemtype="http://schema.org/WebPage"><meta itemprop="position" content="4" /><div class="item-info"> <h2 class="title" itemprop="name headline"><a href="/biblio/554255-propagation-linear-nonlinear-spin-wave-excitations-yig-lu-sub-bi-sub-fe-sub-sub-films-studied-space-resolved-brillouin-light-scattering-abstract" itemprop="url">Propagation of linear and nonlinear spin wave excitations in YIG and Lu{sub 2.04}Bi{sub 0.96}Fe{sub 5}O{sub 12} films studied by space resolved Brillouin light scattering (abstract)</a></h2> <div class="metadata"> <small class="text-muted" style="text-transform:uppercase;display:block;line-height:2.5em;">Journal Article</small><span class="authors"> <span class="author">Bauer, M</span> ; <span class="author">Mathieu, C</span> ; <span class="author">Demokritov, S O</span> ; <span class="author">...</span> <span class="text-muted pubdata"> - Journal of Applied Physics</span> </span> </div> <div class="abstract">We have investigated the propagation of surface and backward volume spin waves (BVSW) with the in-plane wavevector k{sub {parallel}}=10{endash}900 cm{sup {minus}1} excited by microwaves in YIG and Lu{sub 2.04}Bi{sub 0.96}Fe{sub 5}O{sub 12} (LBIG) films with the film thicknesses 5 and 1.5 {mu}m, respectively. In all cases the magnetization and k{sub {parallel}} were in the film plane. The frequencies of the spin wave excitations as well as the spatial distribution of their intensities in the linear and in the nonlinear excitation regime were measured by means of a high-stabilization, small-angle Brillouin light scattering setup with a spatial resolution of 30 {mu}m.<a href='#' onclick='$(this).hide().next().show().next().show();return false;' style='margin-left:10px;'>more »</a><span style='display:none;'> It is well-known that in the case of BVSW modes, the Lighthill criterion for modulational instability is fulfilled for both the longitudinal and the transverse perturbations of the initially constant-amplitude wave beam. Therefore, this mode is very much suitable for the investigation of the evolution of a plane-front, constant-amplitude initial beam, and for a direct experimental study of two-dimensional nonlinear diffraction effects of the beam leading to self-focusing. The garnet films with in-plane dimensions of 2{times}10 mm{sup 2} were grown by liquid phase epitaxy onto a single crystalline (111)-oriented gallium gadolinium garnet substrate. Two strip antennas, 35 {mu}m wide and situated at the ends of the films, were used for the excitation of the spin waves and for monitoring. The working frequency was 8.10 GHz. Special efforts were taken to minimize the beam divergence. For all nonlinear studies the initial angular beam divergence was not larger than {Theta}{sub max}=0.05 rad. In the linear regime the attenuation factor was measured, and the reflection of the spin waves from the sample boundaries was studied. We also observed the interference between the two lowest order lateral modes having different initial spatial distributions of the magnetization. (Abstract Truncated)</span><a href='#' onclick='$(this).hide().prev().hide().prev().show();return false;' style='margin-left:10px;display:none;'>« less</a></div><div class="metadata-links small clearfix text-muted" style="margin-top:15px;"> <div class="pure-menu pure-menu-horizontal pull-right" style="width:unset;"> <ul class="pure-menu-list"> <li class="pure-menu-item"><span class="item-info-ftlink">DOI: <a class="misc doi-link " href="https://doi.org/10.1063/1.364909" target="_blank" rel="noopener" title="Link to document DOI" data-ostiid="554255" data-product-type="Journal Article" data-product-subtype="AC" >10.1063/1.364909</a></span></li> </ul> </div> </div> </div> <div class="clearfix"></div> </div> </li> <li> <div class="article item document" itemprop="itemListElement" itemscope itemtype="http://schema.org/WebPage"><meta itemprop="position" content="5" /><div class="item-info"> <h2 class="title" itemprop="name headline"><a href="/pages/biblio/1612184-phase-detection-spin-waves-yttrium-iron-garnet-metal-induced-nonreciprocity" itemprop="url">Phase detection of spin waves in yttrium iron garnet and metal induced nonreciprocity</a></h2> <div class="metadata"> <small class="text-muted" style="text-transform:uppercase;display:block;line-height:2.5em;">Journal Article</small><span class="authors"> <span class="author">Trossman, Jonathan</span> ; <span class="author">Lim, Jinho</span> ; <span class="author">Bang, Wonbae</span> ; <span class="author">...</span> <span class="text-muted pubdata"> - Journal of Applied Physics</span> </span> </div> <div class="abstract">Herein we report experiments which characterize spin wave propagation in a thin (111) yttrium iron garnet film for arbitrary angles between the in-plane magnetic field and the mode wavevectors. By measuring the magnetic field evolution of the phase of the wave traveling across the film, we deduce the frequency dependence of the wavevector, the dispersion relation, from which the mode velocity follows. Additionally, we observe multiple nodes in the regime of the propagating Damon-Eshbach mode; these arise from avoided crossings associated with the higher, exchange split, standing wave modes along the film normal, the positions of which correlate with the<a href='#' onclick='$(this).hide().next().show().next().show();return false;' style='margin-left:10px;'>more »</a><span style='display:none;'> direct absorption measurements of their positions. This information allows a determination of the exchange parameter. Using this technique, we examine the nonreciprocity in spin wave propagation that results from an adjacent metal layer.</span><a href='#' onclick='$(this).hide().prev().hide().prev().show();return false;' style='margin-left:10px;display:none;'>« less</a></div><div class="metadata-links small clearfix text-muted" style="margin-top:15px;"> <div class="pure-menu pure-menu-horizontal pull-right" style="width:unset;"> <ul class="pure-menu-list"> <li class="pure-menu-item"><span class="item-info-ftlink">DOI: <a class="misc doi-link " href="https://doi.org/10.1063/1.5080449" target="_blank" rel="noopener" title="Link to document DOI" data-ostiid="1612184" data-product-type="Journal Article" data-product-subtype="AM" >10.1063/1.5080449</a></span></li> <li class="pure-menu-item"><span class="item-info-ftlink"><a class="misc fulltext-link " href="/pages/servlets/purl/1612184" title="Link to document media" target="_blank" rel="noopener" data-ostiid="1612184" data-product-type="Journal Article" data-product-subtype="AM" >Full Text Available</a></span></li> </ul> </div> </div> </div> <div class="clearfix"></div> </div> </li> <li> <div class="article item document" itemprop="itemListElement" itemscope itemtype="http://schema.org/WebPage"><meta itemprop="position" content="6" /><div class="item-info"> <h2 class="title" itemprop="name headline"><a href="/biblio/22483188-plane-angular-dependence-spin-wave-nonreciprocity-ultrathin-film-dzyaloshinskii-moriya-interaction" itemprop="url">In-plane angular dependence of the spin-wave nonreciprocity of an ultrathin film with Dzyaloshinskii-Moriya interaction</a></h2> <div class="metadata"> <small class="text-muted" style="text-transform:uppercase;display:block;line-height:2.5em;">Journal Article</small><span class="authors"> <span class="author">Zhang, Vanessa Li</span> ; <span class="author">Di, Kai</span> ; <span class="author">Lim, Hock Siah</span> ; <span class="author">...</span> <span class="text-muted pubdata"> - Applied Physics Letters</span> </span> </div> <div class="abstract">The nonreciprocal propagation of spin waves in an ultrathin Pt/Co/Ni film has been measured by Brillouin light scattering. The frequency nonreciprocity, due to the interfacial Dzyaloshinskii-Moriya interaction (DMI), has a sinusoidal dependence on the in-plane angle between the magnon wavevector and the applied magnetic field. The results, which are in good agreement with analytical predictions reported earlier, yield a value of the DMI constant which is the same as that obtained previously from a study of the magnon dispersion relations. We have demonstrated that our magnon-dynamics based method can experimentally ascertain the DMI constant of multilayer thin films.</div><div class="metadata-links small clearfix text-muted" style="margin-top:15px;"> <div class="pure-menu pure-menu-horizontal pull-right" style="width:unset;"> <ul class="pure-menu-list"> <li class="pure-menu-item"><span class="item-info-ftlink">DOI: <a class="misc doi-link " href="https://doi.org/10.1063/1.4926862" target="_blank" rel="noopener" title="Link to document DOI" data-ostiid="22483188" data-product-type="Journal Article" data-product-subtype="AC" >10.1063/1.4926862</a></span></li> </ul> </div> </div> </div> <div class="clearfix"></div> </div> </li> </ul> </aside> </div> </section> </div> <div class="col-sm-3 order-sm-3"> <ul class="nav nav-stacked"> <li class="active"><a class="tab-nav disabled" data-tab="related" style="color: #636c72 !important; opacity: 1;"><span class="fa fa-angle-right"></span> Similar Records</a></li> </ul> </div> </div> </section> </div></div> </div> </div> </section> <footer class="" style="background-color:#f9f9f9; /* padding-top: 0.5rem; */"> <div class="footer-minor"> <div class="container"> <hr class="footer-separator" /> <div class="text-center" style="margin-top:1.25rem;"> <div class="pure-menu pure-menu-horizontal"> <ul class="pure-menu-list" id="footer-org-menu"> <li class="pure-menu-item"> <a href="https://energy.gov" target="_blank" rel="noopener noreferrer"> <img src="data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw==" class="sprite sprite-footer-us-doe-min" alt="U.S. Department of Energy" /> </a> </li> <li class="pure-menu-item"> <a href="https://www.energy.gov/science/office-science" target="_blank" rel="noopener noreferrer"> <img src="data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw==" class="sprite sprite-footer-office-of-science-min" alt="Office of Science" /> </a> </li> <li class="pure-menu-item"> <a href="/"> <img src="data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw==" class="sprite sprite-footer-osti-min" alt="Office of Scientific and Technical Information" /> </a> </li> </ul> </div> </div> <div class="text-center small" style="margin-top:0.5em;margin-bottom:2.0rem;"> <div class="pure-menu pure-menu-horizontal"> <ul class="pure-menu-list"> <li class="pure-menu-item"><a href="/disclaim" class="pure-menu-link"><span class="fa fa-institution"></span> Website Policies <span class="hidden-xs">/ Important Links</span></a></li> <li class="pure-menu-item"><a href="/pages/contact" class="pure-menu-link"><span class="fa fa-comments-o"></span> Contact Us</a></li> <li class="d-block d-md-none"></li> <li class="pure-menu-item"><a href="https://www.facebook.com/ostigov" target="_blank" rel="noopener noreferrer" class="pure-menu-link social"><span class="fa fa-facebook" style=""></span></a></li> <li class="pure-menu-item"><a href="https://twitter.com/OSTIgov" target="_blank" rel="noopener noreferrer" class="pure-menu-link social"><span class="fa fa-twitter" style=""></span></a></li> <li class="pure-menu-item"><a href="https://www.youtube.com/user/ostigov" target="_blank" rel="noopener noreferrer" class="pure-menu-link social"><span class="fa fa-youtube-play" style=""></span></a></li> </ul> </div> </div> </div> </div> </footer> <link href="/pages/css/pages.fonts.200912.1307.css" rel="stylesheet"> <script src="/pages/js/pages.200912.1307.js"></script><noscript></noscript> <script defer src="/pages/js/pages.biblio.200912.1307.js"></script><noscript></noscript> <script defer src="/pages/js/lity.js"></script><noscript></noscript> <script async type="text/javascript" src="/pages/js/Universal-Federated-Analytics-Min.js?agency=DOE" id="_fed_an_ua_tag"></script><noscript></noscript> </body> <!-- DOE PAGES v.200912.1307 --> </html>