Origins of thermal spin depolarization in half-metallic ferromagnet CrO2
Origins of thermal spin depolarization in half-metallic ferromagnet CrO2
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半金属铁磁体 CrO2 热自旋去极化的起源
DOI：
10.1103/physrevlett.121.257201
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Yuji Mur
中科院分区：
文献类型：
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作者：
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;K. Horiba;H. Kumigashira;Yuji Mur
利用高分辨率自旋分辨光发射光谱，我们观察到所有自旋极化电子都参与了热自旋退极化。此外，我们在费米能级附近观察到明显的少数自旋态和相应的退极化，这很少有助于退磁。这种退极化的起源已被确定为半金属铁磁体的多体效应特性。我们的研究开辟了一个聚焦亚mev能量尺度现象的流动铁磁物理实验领域。
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.