Origins of Thermal Spin Depolarization in Half-Metallic Ferromagnet CrO2

Hirokazu Fujiwara, Kensei Terashima, Masanori Sunagawa, Yuko Yano, Takanobu Nagayama, Tetsushi Fukura, Fumiya Yoshii, Yuka Matsuura, Makoto Ogata, Takanori Wakita, Koichiro Yaji, Ayumi Harasawa, Kenta Kuroda, Shik Shin, Koji Horiba, Hiroshi Kumigashira, Yuji Muraoka, Takayoshi Yokoya

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Abstract

Using high-resolution spin-resolved photoemission spectroscopy, we observe a thermal spin depolarization to which all spin-polarized electrons contribute. Furthermore, we observe a distinct minority spin state near the Fermi level and a corresponding depolarization that seldom contributes to demagnetization. The origin of this depolarization has been identified as the many-body effect characteristic of half-metallic ferromagnets. Our investigation opens an experimental field of itinerant ferromagnetic physics focusing on phenomena with sub-meV energy scale.

Original languageEnglish
Article number257201
JournalPhysical Review Letters
Volume121
Issue number25
DOIs
Publication statusPublished - Dec 18 2018

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Fujiwara, H., Terashima, K., Sunagawa, M., Yano, Y., Nagayama, T., Fukura, T., Yoshii, F., Matsuura, Y., Ogata, M., Wakita, T., Yaji, K., Harasawa, A., Kuroda, K., Shin, S., Horiba, K., Kumigashira, H., Muraoka, Y., & Yokoya, T. (2018). Origins of Thermal Spin Depolarization in Half-Metallic Ferromagnet CrO2. Physical Review Letters, 121(25), [257201]. https://doi.org/10.1103/PhysRevLett.121.257201