Canted standing spin-wave modes of permalloy thin films observed by ferromagnetic resonance

Dąbrowski, Maciej; Hicken, Robert J.; Frisk, Andreas; Newman, David G.; Klewe, Christoph; N’Diaye, Alpha T.; Shafer, Padraic; van der Laan, Gerrit; Hesjedal, Thorsten; Bowden, Graham J.

doi:10.1088/1367-2630/abdd6b

Title: Canted standing spin-wave modes of permalloy thin films observed by ferromagnetic resonance

Journal Article · Fri Feb 12 00:00:00 EST 2021 · New Journal of Physics

DOI:https://doi.org/10.1088/1367-2630/abdd6b· OSTI ID:1810807

^[1]; Hicken, Robert J. ^[1];

^[2];

^[1]; Klewe, Christoph ^[3]; N’Diaye, Alpha T. ^[3]; Shafer, Padraic ^[3]; van der Laan, Gerrit ^[2];

^[4]; Bowden, Graham J. ^[5]

Univ. of Exeter (United Kingdom)
Science and Technology Facilities Council (STFC), Oxford (United Kingdom). Diamond Light Source, Ltd.
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
Univ. of Oxford (United Kingdom). Clarendon Lab.
Univ. of Southampton (United Kingdom)

Non-collinear spin structures in materials that combine perpendicular and in-plane magnetic anisotropies are of great technological interest for microwave and spin wave-assisted magnetization switching. [Co/Pt] multilayers are well-known perpendicular anisotropy materials that have the potential to pin the magnetization of a soft magnetic layer, such as permalloy (Py), that has in-plane anisotropy, thereby forming a magnetic exchange spring. Here we report on multilayered [Co/Pt]/Pt/Py films, where an additional ultrathin Pt spacer has been included to control the coupling between the sub-units with in-plane and perpendicular magnetic anisotropy. Vector network analyser (VNA)-ferromagnetic resonance (FMR) measurements were made to obtain a complete picture of the resonant conditions, while the dynamical response of the sub-units was probed by synchrotron-based element- and phase selective x-ray detected FMR (XFMR). For all samples, only slight pinning of the dynamic magnetization of the Py by the [Co/Pt] was noted, and the FMR results were dominated by the 50 nm thick Py layer. Out-of-plane VNA-FMR maps reveal the presence of additional modes, e.g. a perpendicular standing spin-wave (PSSW) state. However, as the magnetic field is reduced below the saturation field, the PSSW state morphs continuously through a series of canted standing spin-wave (CSSW) states into a horizontal standing spin-wave (HSSW) state. The PSSW, CSSW and HSSW states are well described using a multilayer model of the Py film. The observation of CSSW modes is of particular relevance to microwave assisted magnetic recording, where microwave excitation stimulates precession of a soft layer canted out of plane by a pulsed magnetic field.

View Accepted Manuscript (DOE)

Cite

Export

Save

Research Organization:: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); Engineering and Physical Sciences Research Council (EPSRC)

Grant/Contract Number:: AC02-05CH11231; EP/P021190/1; EP/P020151/1; EP/P02047X/1; EP/L015331/1

OSTI ID:: 1810807

Journal Information:: New Journal of Physics, Vol. 23, Issue 2; ISSN 1367-2630

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

References (39)

Gilbert damping of high anisotropy Co/Pt multilayers Devolder, Thibaut; Couet, S.; Swerts, J. Journal of Physics D: Applied Physics, Vol. 51, Issue 13 https://doi.org/10.1088/1361-6463/aaaf30	journal	March 2018
Spin wave resonance excitation in ferromagnetic films using planar waveguide structures Khivintsev, Y. V.; Reisman, L.; Lovejoy, J. Journal of Applied Physics, Vol. 108, Issue 2 https://doi.org/10.1063/1.3435318	journal	July 2010
Ferromagnetic Resonance in Thin Films of Permalloy Tannenwald, P. E.; Seavey, M. H. Physical Review, Vol. 105, Issue 2 https://doi.org/10.1103/physrev.105.377	journal	January 1957
Time-resolved X-ray detected ferromagnetic resonance of spin currents van der Laan, Gerrit Journal of Electron Spectroscopy and Related Phenomena, Vol. 220 https://doi.org/10.1016/j.elspec.2016.12.011	journal	October 2017
Anomalous High-frequency Resistance of Ferromagnetic Metals Griffiths, J. H. E. Nature, Vol. 158, Issue 4019 https://doi.org/10.1038/158670a0	journal	November 1946
Expanding the Lorentz concept in magnetism Bowden, G. J.; van der Laan, G.; Hesjedal, T. New Journal of Physics, Vol. 21, Issue 7 https://doi.org/10.1088/1367-2630/ab2f63	journal	July 2019
Magnetic properties of L 1 ₀ -FePt/permalloy exchange-spring films Utsumiya, Kazutoshi; Seki, Takeshi; Takanashi, Koki Journal of Applied Physics, Vol. 110, Issue 10 https://doi.org/10.1063/1.3662901	journal	November 2011
Theory of standing spin waves in a finite-size chiral spin soliton lattice Kishine, J.; Sinitsyn, Vl. E.; Bostrem, I. G. Physical Review B, Vol. 100, Issue 2 https://doi.org/10.1103/physrevb.100.024411	journal	July 2019
Spin-wave resonance Weber, R. IEEE Transactions on Magnetics, Vol. 4, Issue 1 https://doi.org/10.1109/tmag.1968.1066187	journal	March 1968
Asymptotic behavior of local dipolar fields in thin films Bowden, G. J.; Stenning, G. B. G.; van der Laan, G. Journal of Magnetism and Magnetic Materials, Vol. 416 https://doi.org/10.1016/j.jmmm.2016.04.063	journal	October 2016
Spin wave-assisted reduction in switching field of highly coercive iron-platinum magnets Seki, Takeshi; Utsumiya, Kazutoshi; Nozaki, Yukio Nature Communications, Vol. 4, Issue 1 https://doi.org/10.1038/ncomms2737	journal	April 2013
Spin Wave Mode Excited by Spin-Polarized Current in a Magnetic Nanocontact is a Standing Self-Localized Wave Bullet Slavin, Andrei; Tiberkevich, Vasil Physical Review Letters, Vol. 95, Issue 23 https://doi.org/10.1103/physrevlett.95.237201	journal	November 2005
Magnon spintronics Chumak, A. V.; Vasyuchka, V. I.; Serga, A. A. Nature Physics, Vol. 11, Issue 6 https://doi.org/10.1038/nphys3347	journal	June 2015
Spin waves in ferromagnets Phillips, T. G.; Rosenberg, H. M. Reports on Progress in Physics, Vol. 29, Issue 1 https://doi.org/10.1088/0034-4885/29/1/307	journal	January 1966
Ferromagnetic resonance Kittel, C. Journal de Physique et le Radium, Vol. 12, Issue 3 https://doi.org/10.1051/jphysrad:01951001203029100	journal	January 1951
Excitation of Spin Waves in Ferromagnets: Eddy Current and Boundary Condition Effects Pincus, P. Physical Review, Vol. 118, Issue 3 https://doi.org/10.1103/physrev.118.658	journal	May 1960
Microwave soft x-ray microscopy for nanoscale magnetization dynamics in the 5–10 GHz frequency range Bonetti, Stefano; Kukreja, Roopali; Chen, Zhao Review of Scientific Instruments, Vol. 86, Issue 9 https://doi.org/10.1063/1.4930007	journal	September 2015
Quantized spin-wave modes in long cylindrical ferromagnetic nanowires in a transverse external magnetic field Tartakovskaya, Elena V. Physical Review B, Vol. 71, Issue 18 https://doi.org/10.1103/physrevb.71.180404	journal	May 2005
Exchange-torque-induced excitation of perpendicular standing spin waves in nanometer-thick YIG films Qin, Huajun; Hämäläinen, Sampo J.; van Dijken, Sebastiaan Scientific Reports, Vol. 8, Issue 1 https://doi.org/10.1038/s41598-018-23933-y	journal	April 2018
Coherent Transfer of Spin Angular Momentum by Evanescent Spin Waves within Antiferromagnetic NiO Dąbrowski, Maciej; Nakano, Takafumi; Burn, David M. Physical Review Letters, Vol. 124, Issue 21 https://doi.org/10.1103/physrevlett.124.217201	journal	May 2020
Nanoscale interface confinement of ultrafast spin transfer torque driving non-uniform spin dynamics Razdolski, Ilya; Alekhin, Alexandr; Ilin, Nikita Nature Communications, Vol. 8, Issue 1 https://doi.org/10.1038/ncomms15007	journal	April 2017
X-ray magnetic circular dichroism—A versatile tool to study magnetism van der Laan, Gerrit; Figueroa, Adriana I. Coordination Chemistry Reviews, Vol. 277-278 https://doi.org/10.1016/j.ccr.2014.03.018	journal	October 2014
Waveguide-based ferromagnetic resonance measurements of metallic ferromagnetic films in transmission and reflection Kostylev, M. Journal of Applied Physics, Vol. 113, Issue 5 https://doi.org/10.1063/1.4790172	journal	February 2013
Classics in Magnetics A Phenomenological Theory of Damping in Ferromagnetic Materials Gilbert, T. L. IEEE Transactions on Magnetics, Vol. 40, Issue 6 https://doi.org/10.1109/TMAG.2004.836740	journal	November 2004
Optically and Microwave-Induced Magnetization Precession in [Co/Pt]/NiFe Exchange Springs Da̧browski, Maciej; Frisk, Andreas; Burn, David M. ACS Applied Materials & Interfaces, Vol. 12, Issue 46 https://doi.org/10.1021/acsami.0c14058	journal	November 2020
Spin-torque oscillator with tilted fixed layer magnetization Zhou, Yan; Zha, C. L.; Bonetti, S. Applied Physics Letters, Vol. 92, Issue 26 https://doi.org/10.1063/1.2955831	journal	June 2008
Mode-Resolved Detection of Magnetization Dynamics Using X-ray Diffractive Ferromagnetic Resonance Burn, David M.; Zhang, Shilei; Zhai, Kun Nano Letters, Vol. 20, Issue 1 https://doi.org/10.1021/acs.nanolett.9b03989	journal	December 2019
Ferromagnetic resonance of ultrathin metallic layers Farle, Michael Reports on Progress in Physics, Vol. 61, Issue 7 https://doi.org/10.1088/0034-4885/61/7/001	journal	July 1998
Strong asymmetry of microwave absorption by bilayer conducting ferromagnetic films in the microstrip-line based broadband ferromagnetic resonance Kostylev, M. Journal of Applied Physics, Vol. 106, Issue 4 https://doi.org/10.1063/1.3187547	journal	August 2009
Depth-Resolved Magnetization Dynamics Revealed by X-Ray Reflectometry Ferromagnetic Resonance Burn, D. M.; Zhang, S. L.; Yu, G. Q. Physical Review Letters, Vol. 125, Issue 13 https://doi.org/10.1103/physrevlett.125.137201	journal	September 2020
Spin waves in permalloy nanowires: The importance of easy-plane anisotropy Nguyen, T. M.; Cottam, M. G.; Liu, H. Y. Physical Review B, Vol. 73, Issue 14 https://doi.org/10.1103/physrevb.73.140402	journal	April 2006
Microscopic calculation of spin waves in antiferromagnetically coupled multilayers: Nonreciprocity and finite-size effects Nörtemann, F. C.; Stamps, R. L.; Camley, R. E. Physical Review B, Vol. 47, Issue 18 https://doi.org/10.1103/physrevb.47.11910	journal	May 1993
Optic and acoustic modes measured in a cobalt/Permalloy exchange spring bilayer using inductive magnetometry Crew, D. C.; Kennewell, K. J.; Lwin, M. J. Journal of Applied Physics, Vol. 97, Issue 10 https://doi.org/10.1063/1.1849551	journal	May 2005
High-frequency characterization of Permalloy nanosized strips using network analyzer ferromagnetic resonance Kuanr, Bijoy K.; Lopusnik, Radek; Malkinski, Leszek M. Journal of Applied Physics, Vol. 103, Issue 7 https://doi.org/10.1063/1.2839625	journal	April 2008
Element- and Time-Resolved Measurements of Spin Dynamics Using X-ray Detected Ferromagnetic Resonance Klewe, Christoph; Li, Qian; Yang, Mengmeng Synchrotron Radiation News, Vol. 33, Issue 2 https://doi.org/10.1080/08940886.2020.1725796	journal	April 2020
Exchange anisotropy pinning of a standing spin-wave mode Magaraggia, R.; Kennewell, K.; Kostylev, M. Physical Review B, Vol. 83, Issue 5 https://doi.org/10.1103/physrevb.83.054405	journal	February 2011
Perpendicularly magnetized L 1 ₀ -FePt nanodots exchange-coupled with soft magnetic Ni ₈₁ Fe ₁₉ Zhou, W.; Seki, T.; Iwama, H. Journal of Applied Physics, Vol. 117, Issue 1 https://doi.org/10.1063/1.4905302	journal	January 2015
Modeling the magnetic properties of DyFe2/YFe2 superlattices Bowden, G. J.; Beaujour, J. -M. L.; Zhukov, A. A. Journal of Applied Physics, Vol. 93, Issue 10 https://doi.org/10.1063/1.1539072	journal	May 2003
A novel broadband ferromagnetic resonance spectrometer Unwin, M. E.; Haycock, P. W.; Hoon, S. R. Journal of Magnetism and Magnetic Materials, Vol. 205, Issue 2-3 https://doi.org/10.1016/s0304-8853(99)00521-1	journal	November 1999

Similar Records

Exchange anisotropy, engineered coercivity and spintronics in atomically engineered L1₀ heterostructures

Technical Report · Tue Aug 30 00:00:00 EDT 2011 · OSTI ID:1810807

Krishnan, Kannan M.

Efficient Excitation of High-Frequency Exchange-Dominated Spin Waves in Periodic Ferromagnetic Structures

Journal Article · Tue Mar 28 00:00:00 EDT 2017 · Physical Review Applied · OSTI ID:1810807

Navabi, Aryan; Chen, Cai; Barra, Anthony; +12 more

Interlayer exchange coupling between layers with perpendicular and easy-plane magnetic anisotropies

Journal Article · Mon Aug 22 00:00:00 EDT 2016 · Applied Physics Letters · OSTI ID:1810807

Fallarino, Lorenzo; Sluka, Volker; Kent, Andrew D.; +3 more

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ferromagnetic resonance
standing spin waves
XFMR
canted magnetization
exchange spring magnet

Title: Canted standing spin-wave modes of permalloy thin films observed by ferromagnetic resonance

Citation Formats

References (39)

Similar Records

Related Subjects