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Title: Polycrystalline magnetic garnet films comprising weakly coupled crystallites for piezoelectrically-driven magneto-optic spatial light modulators

Abstract

We have investigated the magnetization process of the polycrystalline magnetic garnet films in order to determine the most suitable composition of garnet films for piezoelectrically-driven magneto-optic spatial light modulators (MOSLMs). For experiment, the bismuth-dysprosium-aluminum-substituted yttrium iron (Bi{sub 1.3}Dy{sub 0.7}Y{sub 1.0}Fe{sub 3.1}Al{sub 1.9}O{sub 12}) garnet films were deposited by an RF magnetron sputter and annealed at 700 deg. C in air. The annealing time was varied in a range of several minutes to control the grain size. The saturation magnetization, the remanent magnetization and the composition of the fabricated garnet films slightly changed versus the annealing time. Experiments showed that the coercivity and the grain size increased at longer annealing; the coercivity was larger for films with bigger grains. This work shows that garnet films with smaller coercivity are most suitable for controlling the magnetization of garnet and, correspondingly, the magneto-optical rotation of MOSLM pixels driven by piezoelectrics.

Authors:
; ; ;  [1];  [2]
  1. Toyohashi University of Technology, Toyohashi, Aichi 441-8580 (Japan)
  2. Electronics-Inspired Interdisciplinary Research Institute Toyohashi, Aichi 441-8580 (Japan)
Publication Date:
OSTI Identifier:
22038912
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 111; Journal Issue: 7; Conference: 55. annual conference on magnetism and magnetic materials, Atlanta, GA (United States), 14-18 Nov 2010; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINATES; ANNEALING; BISMUTH COMPOUNDS; COERCIVE FORCE; DEPOSITION; DYSPROSIUM COMPOUNDS; GARNETS; GRAIN SIZE; IRON COMPOUNDS; MAGNETIZATION; MAGNETO-OPTICAL EFFECTS; PIEZOELECTRICITY; POLYCRYSTALS; THIN FILMS; YTTRIUM COMPOUNDS

Citation Formats

Mito, S, Sakurai, H, Takagi, H, Inoue, M, Baryshev, A V, and Ioffe Physical-Technical Institute, St. Petersburg 194021. Polycrystalline magnetic garnet films comprising weakly coupled crystallites for piezoelectrically-driven magneto-optic spatial light modulators. United States: N. p., 2012. Web. doi:10.1063/1.3679459.
Mito, S, Sakurai, H, Takagi, H, Inoue, M, Baryshev, A V, & Ioffe Physical-Technical Institute, St. Petersburg 194021. Polycrystalline magnetic garnet films comprising weakly coupled crystallites for piezoelectrically-driven magneto-optic spatial light modulators. United States. https://doi.org/10.1063/1.3679459
Mito, S, Sakurai, H, Takagi, H, Inoue, M, Baryshev, A V, and Ioffe Physical-Technical Institute, St. Petersburg 194021. 2012. "Polycrystalline magnetic garnet films comprising weakly coupled crystallites for piezoelectrically-driven magneto-optic spatial light modulators". United States. https://doi.org/10.1063/1.3679459.
@article{osti_22038912,
title = {Polycrystalline magnetic garnet films comprising weakly coupled crystallites for piezoelectrically-driven magneto-optic spatial light modulators},
author = {Mito, S and Sakurai, H and Takagi, H and Inoue, M and Baryshev, A V and Ioffe Physical-Technical Institute, St. Petersburg 194021},
abstractNote = {We have investigated the magnetization process of the polycrystalline magnetic garnet films in order to determine the most suitable composition of garnet films for piezoelectrically-driven magneto-optic spatial light modulators (MOSLMs). For experiment, the bismuth-dysprosium-aluminum-substituted yttrium iron (Bi{sub 1.3}Dy{sub 0.7}Y{sub 1.0}Fe{sub 3.1}Al{sub 1.9}O{sub 12}) garnet films were deposited by an RF magnetron sputter and annealed at 700 deg. C in air. The annealing time was varied in a range of several minutes to control the grain size. The saturation magnetization, the remanent magnetization and the composition of the fabricated garnet films slightly changed versus the annealing time. Experiments showed that the coercivity and the grain size increased at longer annealing; the coercivity was larger for films with bigger grains. This work shows that garnet films with smaller coercivity are most suitable for controlling the magnetization of garnet and, correspondingly, the magneto-optical rotation of MOSLM pixels driven by piezoelectrics.},
doi = {10.1063/1.3679459},
url = {https://www.osti.gov/biblio/22038912}, journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 7,
volume = 111,
place = {United States},
year = {Sun Apr 01 00:00:00 EDT 2012},
month = {Sun Apr 01 00:00:00 EDT 2012}
}