Properties of Heusler-type materials Fe2TSi and FeCo2Si

Electronic structure and x-ray magnetic circular dichroism in the Heusler alloy Co_{2}FeSi

“…The details of the computational method are described in the previous papers [28][29][30][31], and here we only mention some aspects specific to the present calculations. The calculations were performed for the experimentally observed lattice constant a = 5.658Å [32] as well as for the one theoretically calculated in total energy optimization using the spin-polarized fully relativistic linear-muffin-tinorbital (SPR LMTO) method [33,34] with the combined correction term taken into account. The LSDA part of the calculations was based on the spin-density functional with the Perdew-Wang [35] of the exchange-correlation potential.…”

Effect of partial substitution of silicon by other sp-valent elements on structure, magnetic properties and electrical resistivity of Co2FeSi Heusler alloys

“…Among half-metallic type Co based full Heusler alloys, Co 2 FeSi alloys have garnered much interest due to their high Curie temperature (T c $ 1100 K), low damping constant (0.004) and high magnetic moment ($6 l B /f.u) [6,7]. Despite theoretical predictions [8,9] it is, however, difficult to practically demonstrate half-metallicity in these compounds [10].…”

Ferromagnetic resonance in Co2MnGa films with various structural ordering

“…However, the saturation magnetization M S (M S E 450 G-2.5 m B f.u.) of our films with the highest ordering is still lower than that of the bulk (4.05 m B ) [2] and Co 2 MnGa epitaxial films (3.5 m B ) [1]. Moreover, M S and M eff differ substantially which may be related also to a high easy plane anisotropy of Co 2 MnGa films due to magnetostriction [1].…”

“…The amorphous films are weakly magnetic and inhomogeneous with the saturation magnetization M S $25 G at room temperature (RT) and with the magnetic regions having the effective magnetization M eff E200-300 G. The L2 1 -ordered films are ferromagnetic with the Curie temperature of 650 K and M S (RT)E450 GE2.5 m B f.u. (lower than the bulk value of 4 m B ) and M eff (RT) ¼ 500-550 G. The temperatures of ordering from the amorphous to A2 (B2) structure and from A2 (B2) to L2 1 structure are estimated to 430 and 550 K, respectively.Recently, Pechan et al[1] reported on ferromagnetic resonance (FMR) investigations of the single-crystal Co 2 MnGa Heusler alloy (HA) films, which are supposed to reveal nearly half-metallic behavior [2]. We present the results of FMR measurements in Co 2 MnGa films with different crystalline ordering.…”

“…[1] reported on ferromagnetic resonance (FMR) investigations of the single-crystal Co 2 MnGa Heusler alloy (HA) films, which are supposed to reveal nearly half-metallic behavior [2]. We present the results of FMR measurements in Co 2 MnGa films with different crystalline ordering.…”