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  1. 数理物質系 (Faculty of Pure and Applied Sciences)
  2. 喜多 英治 (Kita Eiji)
  1. 数理物質系 (Faculty of Pure and Applied Sciences)
  2. 柳原 英人 (Yanagihara Hideto)
  1. 数理物質系 (Faculty of Pure and Applied Sciences)
  2. Sonia Sharmin (ソニア シャーミン)
  1. コンテンツタイプ (Contents Type)
  2. 雑誌発表論文等 (Journal article, etc.)
  3. A~
  4. Applied physics letters

Large negative uniaxial magnetic anisotropy in highly distorted Co-ferrite thin films

http://hdl.handle.net/2241/00158701
181e8dca-80b9-408f-bc85-452f3618bc1c
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APL_114-9.pdf APL_114-9 (1.8 MB)
item type Journal Article(1)
公開日 2019-11-26
タイトル
タイトル Large negative uniaxial magnetic anisotropy in highly distorted Co-ferrite thin films
言語
言語 eng
資源タイプ
タイプ journal article
著者 ソニア, シャーミン

× ソニア, シャーミン

WEKO 204454
e-Rad 00753344
筑波大学研究者総覧 0000003683

ソニア, シャーミン

ja-Kana ソニア, シャーミン

en SONIA, Sharmin

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喜多, 英治

× 喜多, 英治

WEKO 28
筑波大学研究者総覧 0000000719

喜多, 英治

ja-Kana キタ, エイジ

en KITA, Eiji

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柳原, 英人

× 柳原, 英人

WEKO 570
e-Rad 50302386
筑波大学研究者総覧 0000000744

柳原, 英人

ja-Kana ヤナギハラ, ヒデト

en YANAGIHARA, Hideto

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Tainosho, Takeshi

× Tainosho, Takeshi

WEKO 216541

en Tainosho, Takeshi

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Inoue, Jun-ichiro

× Inoue, Jun-ichiro

WEKO 216542

en Inoue, Jun-ichiro

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Takeguchi, Masaki

× Takeguchi, Masaki

WEKO 216544

en Takeguchi, Masaki

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抄録
内容記述 The strain induced magnetic anisotropy (MA) of epitaxial Co-ferrite (CFO) thin films grown on MgAl2O4(001) (MAO) by reactive sputtering was studied. These films underwent large tetragonal compressive strain due to the lattice mismatch between the substrates and films, resulting in tetragonalities of up to −0.04. Scanning transmission electron microscopy observation combined with fast Fourier transform analysis revealed that the lattice distortion monotonically relaxed with the increasing film thickness. Unlike the CFO(001) films on MgO(001) substrates, a magnetically enhanced layer exists at the interface between CFO and MAO. A large negative uniaxial MA energy of −5.9 MJ/m3 was confirmed for the thinnest film of 12.9 nm at 300 K by magneto-torque measurements. The induced uniaxial anisotropy decreased with the increasing film thickness owing to misfit relaxation. The magneto-elastic (ME) constant, which was determined by a fitting line for films with different thicknesses and therefore different tetragonalities, was 0.15±0.01 GJ/m3. This result is consistent with the value of 0.14 GJ/m3 for the bulk and suggests that the framework of the phenomenological ME theory for CFO is valid for a wide range of tetragonalities, at least up to −0.04. Our results also indicate that the misfit engineering of CFO thin films has great potential in inducing enhanced uniaxial MA.
書誌情報 Applied physics letters

巻 114, 号 9, p. 092408, 発行日 2019-03
ISSN
収録物識別子 0003-6951
書誌レコードID
収録物識別子 AA00543431
DOI
関連識別子
関連識別子 10.1063/1.5064845
権利
権利情報 © 2019 Author(s).
権利
権利情報 This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Appl. Phys. Lett. 114, 092408 (2019) and may be found at https://doi.org/10.1063/1.5064845.
著者版フラグ
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出版者
出版者 American Institute of Physics
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