Angular momentum compensation manipulation to room temperature of the ferrimagnet Ho $_{3-x}$ Dy $_{x}$ FeO $_{12}$ detected by the Barnett effect

Imai, Masaki ; Chudo, Hiroyuki ; Ono, Masao ; Harii, Kazuya; Matsuo, Mamoru; Onuma, Yuichi*; Maekawa, Sadamichi; Saito, Eiji

We demonstrate that the angular momentum compensation temperature $T_{rm A}$ , at which the net angular momentum in the sample disappears, can be controlled in HoFeO $_{12}$ by partially substituting Dy for Ho. The $T_{rm A}$ can be detected using the Barnett effect, by which mechanical rotation magnetizes an object due to spin-rotation coupling. We found that $T_{rm A}$ increases with the Dy content and clarified that the $T_{rm A}$ of Ho $_{1.5}$ Dy $_{1.5}$ FeO $_{12}$ coincides with room temperature. The Barnett effect enables us to explore materials applicable to magnetic devices utilizing the angular momentum compensation only by rotating the powder sample at room temperature.

Language	:	English
Journal	:	Applied Physics Letters
Volume	:	114
Number	:	16
Pages	:	p.162402_1 - 162402_4
Publication Year/Month	:	2019/04
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Paper URL	:	https://doi.org/10.1063/1.5095166
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Keywords	:	角運動量補償; バーネット効果; フェリ磁性
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Article of JAEA R&D Review	:	Detection of the Singularity of Magnets Using Rotation; Measuring the Angular Momentum Compensation, Key to Speeding Up Magnetic Devices[/]
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Registration No. : AA20190030
JAEA Abstracts No. : 48000634
Paper Submission No. : 22919

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Angular momentum compensation manipulation to room temperature of the ferrimagnet HoDyFeO detected by the Barnett effect

Angular momentum compensation manipulation to room temperature of the ferrimagnet Ho $_{3-x}$ Dy $_{x}$ FeO $_{12}$ detected by the Barnett effect