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

Abstract

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+.

Authors:
 [1];  [1];  [2];  [2]
  1. Charles Univ., Prague (Czech Republic). Faculty of Mathematics and Physics
  2. Colorado State Univ., Fort Collins, CO (United States). Dept. of Physics
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Spins and Heat in Nanoscale Electronic Systems (SHINES)
Sponsoring Org.:
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)
OSTI Identifier:
1371198
Grant/Contract Number:  
SC0012670
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 108; Journal 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; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE; phonons; thermal conductivity; thermoelectric; spin dynamics; spintronics

Citation Formats

Jakubisova, Eva Liskova, Visnovsky, Stefan, Chang, Houchen, and Wu, Mingzhong. Interface effects in nanometer-thick yttrium iron garnet films studied by magneto-optical spectroscopy. United States: N. p., 2016. Web. doi:10.1063/1.4942379.
Jakubisova, Eva Liskova, Visnovsky, Stefan, Chang, Houchen, & Wu, Mingzhong. Interface effects in nanometer-thick yttrium iron garnet films studied by magneto-optical spectroscopy. United States. https://doi.org/10.1063/1.4942379
Jakubisova, Eva Liskova, Visnovsky, Stefan, Chang, Houchen, and Wu, Mingzhong. 2016. "Interface effects in nanometer-thick yttrium iron garnet films studied by magneto-optical spectroscopy". United States. https://doi.org/10.1063/1.4942379. https://www.osti.gov/servlets/purl/1371198.
@article{osti_1371198,
title = {Interface effects in nanometer-thick yttrium iron garnet films studied by magneto-optical spectroscopy},
author = {Jakubisova, Eva Liskova and Visnovsky, Stefan and Chang, Houchen and Wu, Mingzhong},
abstractNote = {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+.},
doi = {10.1063/1.4942379},
url = {https://www.osti.gov/biblio/1371198}, journal = {Applied Physics Letters},
issn = {0003-6951},
number = 8,
volume = 108,
place = {United States},
year = {Tue Feb 23 00:00:00 EST 2016},
month = {Tue Feb 23 00:00:00 EST 2016}
}

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Cited by: 25 works
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Works referenced in this record:

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Works referencing / citing this record:

On the Role of Interfaces on Spin Transport in Magnetic Insulator/Normal Metal Heterostructures
journal, May 2019


Stress-induced magnetic properties of PLD-grown high-quality ultrathin YIG films
journal, May 2018


Magnetization reversal in YIG/GGG(111) nanoheterostructures grown by laser molecular beam epitaxy
journal, January 2017


Synthetic Antiferromagnetic Coupling Between Ultrathin Insulating Garnets
journal, October 2018


Spin transport parameters of NbN thin films characterized by spin pumping experiments
journal, January 2019


Role of damping in spin Seebeck effect in yttrium iron garnet thin films
journal, April 2017


Magnetization reversal in YIG/GGG(111) nanoheterostructures grown by laser molecular beam epitaxy
text, January 2017


Synthetic antiferromagnetic coupling between ultra-thin insulating garnets
text, January 2018