TY - JOUR
T1 - Observation of intrinsic half-metallic behavior of CrO2 (100) epitaxial films by bulk-sensitive spin-resolved PES
AU - Fujiwara, Hirokazu
AU - Sunagawa, Masanori
AU - Terashima, Kensei
AU - Kittaka, Tomoko
AU - Wakita, Takanori
AU - Muraoka, Yuji
AU - Yokoya, Takayoshi
N1 - Funding Information:
We thank Vladimir N. Strocov and Markus Donath for fruitful discussions. We also appreciate S. J. Denholme proofreading the manuscript. We also thank T. Fukura, T. Nagayama, and A. Takeda for their assistance in spin-resolved PES measurements. This work was partially supported by the Program for Promoting the Enhancement of Research Universities and a Grant-in-Aid for Japan Society for the Promotion of Science (JSPS) Fellows (No. 16J03208) from the Ministry of Education, Culture, Sports, Science and Technology of Japan (MEXT). LEED and PES measurements at HiSOR were conducted under the project (BL-5-14-A6). H. F. would like to acknowledge the support from the Motizuki Fund of Yukawa Memorial Foundation. H. F. was supported by a Grant-in-Aid for JSPS Fellows.
Funding Information:
We thank Vladimir N. Strocov and Markus Donath for fruitful discussions. We also appreciate S. J. Denholme proofreading the manuscript. We also thank T. Fukura, T. Nagayama, and A. Takeda for their assistance in spin-resolved PES measurements. This work was partially supported by the Program for Promoting the Enhancement of Research Universities and a Grant-in-Aid for Japan Society for the Promotion of Science (JSPS) Fellows (No. 16J03208 ) from the Ministry of Education, Culture, Sports, Science and Technology of Japan (MEXT). LEED and PES measurements at HiSOR were conducted under the project (BL-5-14-A6). H. F. would like to acknowledge the support from the Motizuki Fund of Yukawa Memorial Foundation . H. F. was supported by a Grant-in-Aid for JSPS Fellows.
Publisher Copyright:
© 2017 Elsevier B.V.
PY - 2017/10
Y1 - 2017/10
N2 - We have investigated the electronic states and spin polarization of half-metallic ferromagnet CrO2 (100) epitaxial films by bulk-sensitive spin-resolved photoemission spectroscopy with a focus on non-quasiparticle (NQP) states derived from electron-magnon interactions. We found that the averaged values of the spin polarization are approximately 100% and 40% at 40 K and 300 K, respectively. This is consistent with the previously reported result [H. Fujiwara et al., Appl. Phys. Lett. 106, 202404 (2015).]. At 100 K, peculiar spin depolarization was observed at the Fermi level (EF), which is supported by theoretical calculations predicting NQP states. This suggests the possible appearance of NQP states in CrO2. We also compare the temperature dependence of our spin polarizations with that of the magnetization.
AB - We have investigated the electronic states and spin polarization of half-metallic ferromagnet CrO2 (100) epitaxial films by bulk-sensitive spin-resolved photoemission spectroscopy with a focus on non-quasiparticle (NQP) states derived from electron-magnon interactions. We found that the averaged values of the spin polarization are approximately 100% and 40% at 40 K and 300 K, respectively. This is consistent with the previously reported result [H. Fujiwara et al., Appl. Phys. Lett. 106, 202404 (2015).]. At 100 K, peculiar spin depolarization was observed at the Fermi level (EF), which is supported by theoretical calculations predicting NQP states. This suggests the possible appearance of NQP states in CrO2. We also compare the temperature dependence of our spin polarizations with that of the magnetization.
KW - Bulk-sensitive spin-resolved photoemission spectroscopy
KW - Electron-magnon interaction
KW - Half-metallic ferromagnet
KW - Non-quasiparticle state
KW - Spintronics
UR - http://www.scopus.com/inward/record.url?scp=85013671494&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85013671494&partnerID=8YFLogxK
U2 - 10.1016/j.elspec.2017.02.003
DO - 10.1016/j.elspec.2017.02.003
M3 - Article
AN - SCOPUS:85013671494
SN - 0368-2048
VL - 220
SP - 46
EP - 49
JO - Journal of Electron Spectroscopy and Related Phenomena
JF - Journal of Electron Spectroscopy and Related Phenomena
ER -