Soft X-ray photoemission study of Co2(Cr1−xFex)Ga Heusler compounds. (2nd July 2015)

• Record Type: Journal Article
• Authors: Tsunekawa, Masanori; Hattori, Yoshiro; Sekiyama, Akira; Fujiwara, Hidenori; Suga, Shigemasa; Muro, Takayuki; Kanomata, Takeshi; Imada, Shin
• Is Part Of: Japanese journal of applied physics. Volume 54:Number 8(2015:Aug.)
• Publication Date: 2015-07-02
• Subjects: Physics -- Periodicals; 621.05
• DOI: 10.7567/JJAP.54.082401
• Languages: English
• ISSNs: 0021-4922

Abstract

Abstract: We have performed soft X-ray photoemission spectroscopy (SXPES) and X-ray absorption spectroscopy (XAS) of the Co-based Heusler compounds Co2 (Cr1− x Fe x )Ga ( x = 0.0, 0.4, and 1.0) in order to study their electronic structures. Band-structure calculation was carried out and compared with the experimental results. SXPES spectra show h ν-dependence, revealing the contributions of the Co, Cr, and Fe 3d electronic states in the valence band. The band width observed by the SXPES seems to be narrower than that predicted by the band-structure calculation. XAS spectra depend strongly on the the value of x in Co2 (Cr1− x Fe x )Ga. The electron correlation effects are found to be stronger as x changes from 0.0 to 1.0.