Rakesh Jain

Structural and magnetic properties of high energy Ball milled Co2FeAl0.5Si0.5 Heusler alloy

Co2FeAl0.5Si0.5 Heusler alloy were prepared by argon arc meting and high energy ball milling technique has been used to investigate effect of reduction of grain size on structure and magnetic properties. X-ray diffraction analysis reveal that asmelted and all milled samples are single phased with A2 type disordered structure. On milling, saturation magnetization decreases and the value of coercivity increases. Electronic structure calculations show that the Co2FeAl0.5Si0.5 alloy is metallic with magnetic moment of 5.43 μB for ordered structure.Co2FeAl0.5Si0.5 Heusler alloy were prepared by argon arc meting and high energy ball milling technique has been used to investigate effect of reduction of grain size on structure and magnetic properties. X-ray diffraction analysis reveal that asmelted and all milled samples are single phased with A2 type disordered structure. On milling, saturation magnetization decreases and the value of coercivity increases. Electronic structure calculations show that the Co2FeAl0.5Si0.5 alloy is metallic with magnetic moment of 5.43 μB for ordered structure.

Study of the electronic structure properties in Co2NbIn/Sn Heusler alloys

Structural, electronic and magnetic properties of full-Heusler Co2NbIn and Co2NbSn compounds using density functional theory (DFT) have been studied. Lattice parameters obtained by volume optimization are 6.175A and 6179A for Co2NbIn and Co2NbSn respectively. Results suggest that Co2NbIn to be a half-metallic material with a gap of 0.58 eV at the Fermi level in the minority states while Co2NbSn has ferromagnetic behavior. The calculated magnetic moments are 2.00μB, 1.97μB for Co2NbIn and Co2NbSn. Formation energy and elastic parameters results suggest that both are energetically and elastically stable.Structural, electronic and magnetic properties of full-Heusler Co2NbIn and Co2NbSn compounds using density functional theory (DFT) have been studied. Lattice parameters obtained by volume optimization are 6.175A and 6179A for Co2NbIn and Co2NbSn respectively. Results suggest that Co2NbIn to be a half-metallic material with a gap of 0.58 eV at the Fermi level in the minority states while Co2NbSn has ferromagnetic behavior. The calculated magnetic moments are 2.00μB, 1.97μB for Co2NbIn and Co2NbSn. Formation energy and elastic parameters results suggest that both are energetically and elastically stable.

First principle calculation of half metallicity in Ti2MnSb Heusler alloy

Electronic structure and magnetic properties of Ti2MnSb Heusler alloy were computed using density functional theory implemented in WIEN2k code. The calculated magnetic moment at equilibrium lattice constant 6.33A was 2μB. Ti2MnSb shows a half metallic ferrimagnetic behavior with 0.77eV gap in the minority spin.