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arXiv · 1710.07779

Correlation between Compensation Temperatures of Magnetization and Angular Momentum in GdFeCo Ferrimagnets

Yuushou Hirata·Duck-Ho Kim·Takaya Okuno·Tomoe Nishimura·Dae-Yun Kim·Yasuhiro Futakawa·Hiroki Yoshikawa·Arata Tsukamoto·Kab-Jin Kim·Sug-Bong Choe·Teruo Ono
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Abstract

Determining the angular momentum compensation temperature of ferrimagnets is an important step towards ferrimagnetic spintronics, but is not generally easy to achieve it experimentally. We propose a way to estimate the angular momentum compensation temperature of ferrimagnets. We find a linear relation between the compensation temperatures of the magnetization and angular momentum in GdFeCo ferrimagnetic materials, which is proved by theoretically as well as experimentally. The linearity comes from the power-law criticality and is governed by the Curie temperature and the Landé g factors of the elements composing the ferrimagnets. Therefore, measuring the magnetization compensation temperature and the Curie temperature, which are easily assessable experimentally, enables to estimate the angular momentum compensation temperature of ferrimagnets. Our study provides efficient avenues into an exciting world of ferrimagnetic spintronics.

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Yuushou Hirata, Duck-Ho Kim, Takaya Okuno, Tomoe Nishimura, Dae-Yun Kim, Yasuhiro Futakawa, Hiroki Yoshikawa, Arata Tsukamoto, Kab-Jin Kim, Sug-Bong Choe, Teruo Ono. 2017-10-21. Correlation between Compensation Temperatures of Magnetization and Angular Momentum in GdFeCo Ferrimagnets. https://doi.org/10.1103/physrevb.97.220403

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