Crystal Structures and Magnetic Properties of the Co2Mn1-x V-x Sb (0 <= x <= 1 ) Heusler Compounds

Ak F., Guclu F., SAATÇİ B., Kervan N., Kervan S.

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM, cilt.29, sa.2, ss.409-416, 2016 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 29 Sayı: 2
  • Basım Tarihi: 2016
  • Doi Numarası: 10.1007/s10948-015-3273-5
  • Dergi Adı: JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.409-416
  • Anahtar Kelimeler: Heusler compounds, Magnetic properties, Density functional theory, HALF-METALLICITY, ALLOYS, MAGNETORESISTANCE, SPINTRONICS
  • Erciyes Üniversitesi Adresli: Evet

Özet

Crystal structure and magnetic properties of the Co2Mn1-x V-x Sb (0 <= x <= 1) Heusler compounds have been studied by X-ray powder diffraction (XRD), magnetometric measurements, and full-potential linearized augmented plane wave (FP-LAPW) method. All compounds crystallize in a cubic Cu2MnAl-type crystal structure with the space group Fm-3m. The samples for x < 0.8 have the Curie temperatures above room temperature, while the Curie temperature is observed at 68 K for the sample with x = 0.8. The saturation magnetization at 5 K decreases linearly with increasing vanadium concentration x. The values of the saturation magnetization obtained by FP-LAPW-local density approximation (LDA) calculations are in better agreement with the experimental results compared with the results obtained by FP-LAPW-generalized gradient approximation (GGA) calculations.