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Observation of intrinsic half-metallic behavior of CrO2 (100) epitaxial films by bulk-sensitive spin-resolved PES
- Source :
- Journal of Electron Spectroscopy and Related Phenomena. 220:46-49
- Publication Year :
- 2017
- Publisher :
- Elsevier BV, 2017.
-
Abstract
- We have investigated the electronic states and spin polarization of half-metallic ferromagnet CrO$_2$ (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 ($E_{F}$), which is supported by theoretical calculations predicting NQP states. This suggests the possible appearance of NQP states in CrO$_2$. We also compare the temperature dependence of our spin polarizations with that of the magnetization.<br />Comment: 8 pages, 3 figures, VUVX 2016
- Subjects :
- Photoemission spectroscopy
FOS: Physical sciences
02 engineering and technology
Epitaxy
01 natural sciences
Condensed Matter - Strongly Correlated Electrons
symbols.namesake
Magnetization
0103 physical sciences
Physical and Theoretical Chemistry
010306 general physics
Spectroscopy
Spin-½
Physics
Radiation
Strongly Correlated Electrons (cond-mat.str-el)
Spintronics
Condensed matter physics
Spin polarization
Fermi level
021001 nanoscience & nanotechnology
Condensed Matter Physics
Atomic and Molecular Physics, and Optics
Electronic, Optical and Magnetic Materials
Ferromagnetism
symbols
Condensed Matter::Strongly Correlated Electrons
0210 nano-technology
Subjects
Details
- ISSN :
- 03682048
- Volume :
- 220
- Database :
- OpenAIRE
- Journal :
- Journal of Electron Spectroscopy and Related Phenomena
- Accession number :
- edsair.doi.dedup.....4277528e27697d53b729a4770e6381ad