X-ray magnetic circular dichroism in d and f ferromagnetic materials: recent theoretical progress. Part I (Review Article)

Abstract

Articles you may be interested inRational design of Nb-based alloys for hydrogen separation: A first principles study AIP Advances 3, 022102 (2013); 10.1063/1.4790627 Effects of alloying elements and temperature on the elastic properties of dilute Ni-base superalloys from firstprinciples calculations J. Appl. Phys. 112, 053515 (2012); 10.1063/1.4749406 Thin film reaction of transition metals with germanium J. Vac. Sci. Technol. A 24, 474 (2006); 10.1116/1.2191861 Ab initio study on stability of half-metallic Co-based full-Heusler alloys J. Appl. Phys. 99, 08J112 (2006); 10.1063/1.2176907 X-ray absorption and magnetic circular dichroism studies of annealed magnetic tunnel junctionsThe present state of theoretical understanding of the x-ray magnetic circular dichroism ͑XMCD͒ of 3d compounds is reviewed. Energy band theory based upon the local spin-density approximation ͑LSDA͒ describes the XMCD spectra of transition metal compounds reasonably well. Examples which we examine in detail are XPt 3 compounds ͑with X = V, Cr, Mn, Fe, Co, and Ni͒ in the AuCu 3 structure, the Heusler compounds Co 2 MnGe and Co 2 NbSn, and the compounds with noncollinear magnetic structure IrMnAl and Mn 3 ZnC. Recently achieved improvements for describing the electronic and magnetic structures of 3d compounds are discussed.

Soft x-ray magnetic circular dichroism ofL21-type Co2FeGa Heusler alloy

“…A shoulder observed around 782 eV is about 4 eV higher than the L 3 absorption edge maximum. Such a shoulder has also been reported in the L2 1 -type Co 2 MnGe alloy [17,18] and interpreted as an optical transition to the unoccupied minority t 2g states in the DOS of the Co and it has also been confirmed from the theoretically calculated XAS [19,20]. Actually, the DOS in the minority spin band for the Co of the L2 1 -type Co 2 FeGa alloy has a large peak above E F [11].…”

Electronic Structure of Strongly Correlated Systems

“…Actually XMCD is one of the most promising techniques to reveal local electronic and magnetic properties in a variety of magnetic materials, essentially because of its element as well as shell selectivities. In fact, with the help of circular polarized X-rays of good quality, arising from third-generation synchrotron facilities, a lot of data have been accumulated up to now on XAS and XMCD of transition-metal and rare-earth compounds [6,289,290].…”

X-ray magnetic circular dichroism in Co2FeGa: First-principles calculations

“…The details of the computational method are described in the previous papers, [11][12][13] and here we only mention some aspects specific to the present calculations. The calculations were performed using the spin-polarized fully relativistic linear-muffin-tin-orbital (SPR LMTO) method 14,15 with the combined correction term taken into account.…”