Angular momentum compensation manipulation to room temperature of the ferrimagnet Ho${}_{3-x}$Dy${}_x$Fe${}_5$O${}_{12}$ detected by the Barnett effect

Abstract

We demonstrate that the angular momentum compensation temperature $T_A$, at which the net angular momentum in the sample disappears, can be controlled in Ho${}_3$Fe${}_5$O${}_{12}$ by partially substituting Dy for Ho. The $T_A$ can be detected using the Barnett effect, by which mechanical rotation magnetizes an object due to spin-rotation coupling. We found that $T_A$ increases with the Dy content and clarified that the $T_A$ of Ho${}_{1.5}$Dy${}_{1.5}$Fe${}_5$O${}_{12}$ 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.

arXiv comment5pages, 4figure

References in corpus (2)

• Fast domain wall motion induced by antiferromagnetic spin dynamics at the angular momentum compensation temperature of ferrimagnets
• Observation of gyromagnetic reversal

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