TY - JOUR
T1 - Origins of Thermal Spin Depolarization in Half-Metallic Ferromagnet CrO2
AU - Fujiwara, Hirokazu
AU - Terashima, Kensei
AU - Sunagawa, Masanori
AU - Yano, Yuko
AU - Nagayama, Takanobu
AU - Fukura, Tetsushi
AU - Yoshii, Fumiya
AU - Matsuura, Yuka
AU - Ogata, Makoto
AU - Wakita, Takanori
AU - Yaji, Koichiro
AU - Harasawa, Ayumi
AU - Kuroda, Kenta
AU - Shin, Shik
AU - Horiba, Koji
AU - Kumigashira, Hiroshi
AU - Muraoka, Yuji
AU - Yokoya, Takayoshi
N1 - Funding Information:
We acknowledge H. Adachi, S. Onari, and M. Ichioka for valuable discussions. We thank T. Matsushita and S. Toyoda for their support of our data analysis. We also thank W. Hosoda, A. Takeda, and Y. Suga for technical support, and T. Kambe, T. C. Kobayashi, and their students for help with the magnetization measurements. The laser-based SRPES experiments were conducted at ISSP with the approval of ISSP (Proposals No. A296, No. B248, and No. A182). Parts of the ARPES experiments were performed under the Photon Factory Proposal No. 2018G127. This work was partially supported by the Program for Promoting the Enhancement of Research Universities and a Grant-in-Aid for the Japan Society for the Promotion of Science (JSPS) Fellows (No. 16J03208) from the Ministry of Education, Culture, Sports, Science and Technology of Japan (MEXT). H. F. was supported by a Grant-in-Aid for JSPS Fellows.
Publisher Copyright:
© 2018 American Physical Society.
PY - 2018/12/18
Y1 - 2018/12/18
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevLett.121.257201
DO - 10.1103/PhysRevLett.121.257201
M3 - Article
C2 - 30608774
AN - SCOPUS:85059143370
SN - 0031-9007
VL - 121
JO - Physical Review Letters
JF - Physical Review Letters
IS - 25
M1 - 257201
ER -