Interface effects in nanometer-thick yttrium iron garnet films studied by magneto-optical spectroscopy

Jakubisova, Eva Liskova; Visnovsky, Stefan; Chang, Houchen; Wu, Mingzhong

doi:10.1063/1.4942379

Title: Interface effects in nanometer-thick yttrium iron garnet films studied by magneto-optical spectroscopy

Journal Article · Tue Feb 23 00:00:00 EST 2016 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4942379· OSTI ID:1371198

Jakubisova, Eva Liskova ^[1]; Visnovsky, Stefan ^[1]; Chang, Houchen ^[2]; Wu, Mingzhong ^[2]

Charles Univ., Prague (Czech Republic). Faculty of Mathematics and Physics
Colorado State Univ., Fort Collins, CO (United States). Dept. of Physics

The properties of nanometer-thick yttrium iron garnet (YIG) films are strongly influenced by interfaces. This work employs spectral ellipsometry (SE) and magneto-optic polar Kerr rotation (PKR) to characterize YIG films with thickness, t, from 6 nm to 30 nm grown on Gd₃Ga₅O₁₂ (GGG) substrates oriented parallel to (111) plane. The films display a surface roughness of 0.35 nm or lower. The analysis of the SE data at the photon energies of 1 eV < E < 6.5 eV provided the t and permittivity values. The PKR at 1.3 eV < E < 4.5 eV is reasonably explained with the optical model for the YIG film/GGG substrate system. Even better agreement is achieved by assuming a 1.07-nm-thick layer sandwiched between YIG and GGG that has Fe³⁺ sublattice magnetization opposite to that in the YIG volume. This suggests the existence of antiferromagnetic coupling between the Gd³⁺ and tetrahedral Fe³⁺.

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Research Organization:: Energy Frontier Research Centers (EFRC) (United States). Spins and Heat in Nanoscale Electronic Systems (SHINES)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); Czech Science Foundation; National Science Foundation (NSF); US Army Research Office (ARO); Defense Advanced Research Projects Agency (DARPA)

Grant/Contract Number:: SC0012670

OSTI ID:: 1371198

Journal Information:: Applied Physics Letters, Vol. 108, Issue 8; Related Information: SHINES partners with University of California, Riverside (lead); Arizona State University; Colorado State University; Johns Hopkins University; University of California Irvine; University of California Los Angeles; University of Texas at Austin; ISSN 0003-6951

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 25 works

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Stress-induced magnetic properties of PLD-grown high-quality ultrathin YIG films Bhoi, Biswanath; Kim, Bosung; Kim, Yongsub Journal of Applied Physics, Vol. 123, Issue 20 https://doi.org/10.1063/1.5031198	journal	May 2018
Magnetization reversal in YIG/GGG(111) nanoheterostructures grown by laser molecular beam epitaxy Krichevtsov, Boris B.; Gastev, Sergei V.; Suturin, Sergey M. Science and Technology of Advanced Materials, Vol. 18, Issue 1 https://doi.org/10.1080/14686996.2017.1316422	journal	January 2017
Synthetic Antiferromagnetic Coupling Between Ultrathin Insulating Garnets Gomez-Perez, Juan M.; Vélez, Saül; McKenzie-Sell, Lauren Physical Review Applied, Vol. 10, Issue 4 https://doi.org/10.1103/physrevapplied.10.044046	journal	October 2018
Spin transport parameters of NbN thin films characterized by spin pumping experiments Rogdakis, K.; Sud, A.; Amado, M. Physical Review Materials, Vol. 3, Issue 1 https://doi.org/10.1103/physrevmaterials.3.014406	journal	January 2019
Role of damping in spin Seebeck effect in yttrium iron garnet thin films Chang, Houchen; Praveen Janantha, P. A.; Ding, Jinjun Science Advances, Vol. 3, Issue 4 https://doi.org/10.1126/sciadv.1601614	journal	April 2017
Magnetization reversal in YIG/GGG(111) nanoheterostructures grown by laser molecular beam epitaxy Krichevtsov, Boris B.; Gastev, Sergei V.; Suturin, Sergey M. Taylor & Francis https://doi.org/10.6084/m9.figshare.4872821.v1	text	January 2017
Synthetic antiferromagnetic coupling between ultra-thin insulating garnets Gomez-Perez, Juan M.; Vélez, Saül; McKenzie-Sell, Lauren arXiv https://doi.org/10.48550/arxiv.1803.05545	text	January 2018

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