[14p-A31-1~16] 6.3 Oxide electronics

△ [14p-A31-14] Intrinsic Half-metallicity of CrO₂ Revealed by Bulk-sensitive Spin-resolved Photoemission Spectroscopy

〇Hirokazu Fujiwara¹, Masanori Sunagawa¹, Kensei Terashima², Tomoko Kittaka¹, Makoto Ogata¹, Takanori Wakita², Yuji Muraoka^1,2, Takayoshi Yokoya^1,2 (1.Okayama Univ., 2.Research Inst. for Interdisciplinary Science, Okayama Univ.)

Keywords:half-metal, ferromagnet, photoemission spectroscopy

In this study, in order to experimentally clarify the intrinsic electronic states of a half-metallic candidate CrO₂ whose intirinsic spin-polarized electronic states have been not revealed because of surface contaminant Cr₂O₃, we have constructed a bulk-sensitive spin-resolved photoemission spectroscopy apparatus using a Xe discharge lamp. In addition, we have performed spin-resolved photoemission spectroscopy measurements on CrO₂ (100) films and revealed that CrO₂ (100) films show the half-metallic behavior at 40 K.