Electronic structure, Fermi surface, and Curie temperature calculations for the Co-Pt system

Finite-temperature magnetism ofFexPd1−xandCoPolesya1, Mankovsky2, Šipr3 et al. 2010Phys. Rev. B442370View full textAdd to dashboardCite

“…The Curie temperatures T C of the investigated Co Experimental results [47,48] earlier by relying on the semi-empirical Mohn-Wohlfarth theory [51] were taken from Qi et al [49] for fcc Co, from Kashyap et al [22] for ordered Co-Pt compounds and from Ghosh et al [50] for disordered Co x Pt 1−x alloys. Experimental values [47,48] are shown for comparison.…”

“…To test this approach, we investigate finite-temperature magnetic properties of Pd-rich Fe x Pd 1−x alloys, with Fe concentrations up to 20 at.%, as well as of ordered and disordered Co 3 Pt, CoPt and CoPt 3 alloys that are interesting both for fundamental reasons and for possible use in industrial applications because of their high magnetic anisotropy [20,21]. Theoretical investigations of finite-temperature magnetism of these systems failed so far to reproduce experimental results with satisfactory accuracy [22].…”

Effect of short-range order on electronic and magnetic properties of disordered Co-based alloys

“…For these reasons lots of work on optical and magneto-optical characterization of these systems are available in recent literatures [17]. Theoretical calculations include anisotropic electrical resistivity studies by Ebert et al [18], investigation of electronic structure and magnetic properties of ordered CoPt alloys by Kashyap et al [19], study of magnetism in disordered CoPt alloys by Ebertet al [20] and calculation of ground state properties of CoPt by Shick et al [21]. But, the interesting problem of interrelations of magnetism and local ordering has failed to draw much attention.…”

Interface-Induced Spin Polarization in Graphene on Chromia

“…For this reason, Al is only weakly spinpolarized by neighboring magnetic atoms, as exemplified by Al in MnAl, where the moment m = 0.061 µB per Al atom . Platinum is a well-known exchange-enhanced Pauli paramagnet (χ/χp ≈ 3.8), closer to satisfying the Stoner criterion and, in the vicinity of Fe or Co, develops a magnetic moment m of the order of 0.5 µB per atom [Kashyap 1999]. When graphene is deposited onto a magnetic substrate, then the substrate also exerts an exchange field J*.…”