Origins of thermal spin depolarization in half-metallic ferromagnet CrO${}_2$

Abstract

Using high-resolution spin-resolved photoemission spectroscopy, we observed a thermal spin depolarization to which all spin-polarized electrons contribute. Furthermore we observed 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 characteristics of half-metallic ferromagnets. Our investigation opens an experimental field of itinerant ferromagnetic physics focusing on phenomena with sub-meV energy scale.

19 pages, 10 figures

References in corpus (4)

• Half-metallic ferromagnets: From band structure to many-body effects
• Non-quasiparticle states in Co${}_2$MnSi evidenced through magnetic tunnel junction spectroscopy measurements
• Intrinsic spin polarized electronic structure of CrO2 epitaxial film revealed by bulk-sensitive spin-resolved photoemission spectroscopy
• Observation of Intrinsic Half-metallic Behavior of CrO${}_2$ (100) Epitaxial Films by Bulk-sensitive Spin-resolved PES

Cited by in corpus (6)

• Observation of spin-dependent dual ferromagnetism in perovskite ruthenates
• Superfluid density and two-component conductivity in hole-doped cuprates
• Anomalously large spin-dependent electron correlation in nearly half-metallic ferromagnet CoS${}_2$
• Atomic multiplet and charge-transfer screening effects in 1$s$ and 2$p$ core-level X-ray photoelectron spectra of early 3$d$ transition-metal oxides
• Nonequilibrium magnons from hot electrons in antiferromagnetic systems
• Low-dimensionality-induced tunable ferromagnetism in SrRuO${}_3$ ultrathin films