Effect of Co substitution on the magnetic and transport properties of the half-metallic ferrimagnet Mn2VGa

✍ Scribed by K. Ramesh Kumar; J. Arout Chelvane; G. Markandeyulu; S.K. Malik; N. Harish Kumar

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 952 KB
• Volume: 150
• Category: Article
• ISSN: 0038-1098
• DOI: 10.1016/j.ssc.2009.10.003

✦ Synopsis

Mn 2-x Co x VGa (x = 0.5, 0.75 and 1) compounds were synthesized by arc melting to investigate the effect of cobalt substitution on the magnetic and transport properties of the half-metallic ferrimagnetic compound Mn 2 VGa. The lattice parameter value decreases with the substitution of Co. The compounds Mn 1.25 Co 0.75 VGa and MnCoVGa showed a substantial reduction in magnetic moment due to anti-parallel alignment of the Mn moment with Co and V moments and the M z value for these compounds observed to be 0.35µ B and 0.37µ B respectively. The magnetic moment per formula unit at 5 K, estimated from magnetization data, indicates a slight deviation from the Slater-Pauling relation. The Curie temperature was found to decrease with the Co substitution. Low temperature resistivity data in the temperature range of 18-100 K was observed to follow the relation ρ = ρ 0 + AT 2 + BT 4.5