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Title: Sputtering growth of Y 3 Fe 5 O 12 /Pt bilayers and spin transfer at Y 3 Fe 5 O 12 /Pt interfaces

Authors:
 [1];  [1];  [2];  [1];  [2];  [1]
  1. Department of Physics, Colorado State University, Fort Collins, Colorado 80523, USA
  2. Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, USA
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1411107
Grant/Contract Number:
SC0012670
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
APL Materials
Additional Journal Information:
Journal Volume: 5; Journal Issue: 12; Related Information: CHORUS Timestamp: 2017-12-04 10:08:41; Journal ID: ISSN 2166-532X
Publisher:
American Institute of Physics
Country of Publication:
United States
Language:
English

Citation Formats

Chang, Houchen, Liu, Tao, Reifsnyder Hickey, Danielle, Janantha, P. A. Praveen, Mkhoyan, K. Andre, and Wu, Mingzhong. Sputtering growth of Y 3 Fe 5 O 12 /Pt bilayers and spin transfer at Y 3 Fe 5 O 12 /Pt interfaces. United States: N. p., 2017. Web. doi:10.1063/1.5013626.
Chang, Houchen, Liu, Tao, Reifsnyder Hickey, Danielle, Janantha, P. A. Praveen, Mkhoyan, K. Andre, & Wu, Mingzhong. Sputtering growth of Y 3 Fe 5 O 12 /Pt bilayers and spin transfer at Y 3 Fe 5 O 12 /Pt interfaces. United States. doi:10.1063/1.5013626.
Chang, Houchen, Liu, Tao, Reifsnyder Hickey, Danielle, Janantha, P. A. Praveen, Mkhoyan, K. Andre, and Wu, Mingzhong. Fri . "Sputtering growth of Y 3 Fe 5 O 12 /Pt bilayers and spin transfer at Y 3 Fe 5 O 12 /Pt interfaces". United States. doi:10.1063/1.5013626.
@article{osti_1411107,
title = {Sputtering growth of Y 3 Fe 5 O 12 /Pt bilayers and spin transfer at Y 3 Fe 5 O 12 /Pt interfaces},
author = {Chang, Houchen and Liu, Tao and Reifsnyder Hickey, Danielle and Janantha, P. A. Praveen and Mkhoyan, K. Andre and Wu, Mingzhong},
abstractNote = {},
doi = {10.1063/1.5013626},
journal = {APL Materials},
number = 12,
volume = 5,
place = {United States},
year = {Fri Dec 01 00:00:00 EST 2017},
month = {Fri Dec 01 00:00:00 EST 2017}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1063/1.5013626

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  • We report on the deformation of microwave absorption spectra and of the inverse spin Hall voltage signals in thin film bilayers of yttrium iron garnet (YIG) and platinum at high microwave power levels in a 9.45-GHz TE{sub 011} cavity. As the microwave power increases from 0.15 to 200 mW, the resonance field shifts to higher values, and the initially Lorentzian spectra of the microwave absorption intensity as well as the inverse spin Hall voltage signals become asymmetric. The contributions from opening of the magnetization precession cone and heating of YIG cannot well reproduce the data. Control measurements of inverse spinmore » Hall voltages on thin-film YIG|Pt systems with a range of line widths underscore the role of spin-wave excitations in spectral deformation.« less
  • Cited by 2
  • We report on an experimental study on the spin-waves relaxation rate in two series of nanodisks of diameter ϕ=300, 500, and 700 nm, patterned out of two systems: a 20 nm thick yttrium iron garnet (YIG) film grown by pulsed laser deposition either bare or covered by 13 nm of Pt. Using a magnetic resonance force microscope, we measure precisely the ferromagnetic resonance linewidth of each individual YIG and YIG|Pt nanodisks. We find that the linewidth in the nanostructure is sensibly smaller than the one measured in the extended film. Analysis of the frequency dependence of the spectral linewidth indicates that the improvementmore » is principally due to the suppression of the inhomogeneous part of the broadening due to geometrical confinement, suggesting that only the homogeneous broadening contributes to the linewidth of the nanostructure. For the bare YIG nano-disks, the broadening is associated to a damping constant α=4 × 10{sup −4}. A threefold increase of the linewidth is observed for the series with Pt cap layer, attributed to the spin pumping effect. The measured enhancement allows to extract the spin mixing conductance found to be G{sub ↑↓}=1.55 × 10{sup 14} Ω{sup −1} m{sup −2} for our YIG(20nm)|Pt interface, thus opening large opportunities for the design of YIG based nanostructures with optimized magnetic losses.« less
  • Epitaxial Y[sub 3]Fe[sub 5]O[sub 12](YIG)/Bi[sub 3]Fe[sub 5]O[sub 12](BIG) and YIG/Eu[sub 1]Bi[sub 2]Fe[sub 5]O[sub 12](EBIG) heterostructures have been grown on [111] oriented single-crystalline gadolinium-gallium-garnet substrates by pulsed laser deposition. The effects of the layer thickness ratios on the composition, microstructure, and magnetic properties of the films have been studied employing x-ray diffraction, Rutherford backscattering spectroscopy, vibration sample magnetometry, and Kerr magnetometry. All films under investigation are single crystalline, in the [111] orientation. The multilayered heterostructures displayed superior magnetic properties in comparison to their single crystalline monolayer counterparts, deposited at the same conditions. The YIG/BIG heterostructures indicate increased in-plane saturation magnetic moments,more » approaching the maximum saturation value in bulk YIG. The YIG/EBIG heterostructures show a definite reorientation of the magnetic moment in the out-of-plane direction, a new set of increased saturation magnetization values that go even above that recorded for the bulk YIG, as well as an increase in coercivity.« less
  • The authors have investigated the mechanism and determined the enthalpy of crystallization of x-ray amorphous iron garnets of rare-earth elements and their solid solutions. The authors have established a relation between the mechanism of the solid-phase reaction of formation of the iron garnets and the decrease in the ionic radius of the rare-earth element in the dodecahedral positions. A rise in the temperature during crystallization of amorphous phases facilitates a rapid completion of the reaction in which double oxides with a complex three-sublattice structure are released.