First-principles study on half-metallic ferromagnetism in the diluted magnetic semiconductor (DMS) Al1-xMnxP compounds

Kervan S., Kervan N.

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, cilt.382, ss.63-70, 2015 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 382
  • Basım Tarihi: 2015
  • Doi Numarası: 10.1016/j.jmmm.2015.01.054
  • Dergi Adı: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.63-70
  • Anahtar Kelimeler: Magnetic materials, Ab-initio calculations, Half-metal, Spintronics, GENERALIZED GRADIENT APPROXIMATION, DOPED ALP, AB-INITIO, TEMPERATURE, CR
  • Gazi Üniversitesi Adresli: Evet

Özet

We report the half-metallic properties of the Mn-doped ALP compounds using the full-potential linearized augmented plane wave (FPLAPW) method within the generalized gradient approximation (GGA) embedded in WIEN2k code. Geometry optimization for the Al1-xMnxP compounds was carried out for the different Mn concentrations x=0.0, 0.0625, 0.125 and 025 using supercell. The calculated band structure and density of states show that the half-metallic ferromagnetism is stable for the x=0.0625, 0.125 and 0.25 with a total magnetization of 4 mu(B)/f.u. The total magnetic moment is mainly due to Mn-d states occurring around the Fermi level. The half-metallic band gaps are 1.70, 1.52 and 1.68 eV for x=0.0625, 0.125 and 025, respectively. We also performed GGA with the Hubbard correction (GGA+U) to minimize self-interaction errors. (C) 2015 Elsevier B.V. All rights reserved.