On the R 5d band polarization in rare-earth–transition metal compounds

Author： Burzo E Chioncel L Tetean R Isnard O

ISSN： 0953-8984

Source： Journal of Physics: Condensed Matter, Vol.23, Iss.2, 2011-01, pp. : 26001-26007

Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.

Previous Menu Next

Abstract

Magnetic measurements and band structure calculations were performed on RT₂ and RT₅ compounds, where R is a heavy rare-earth and T = Fe, Co, Ni, Al, as well as on pseudobinary compounds GdCo_{2 − x}A_x (A = Ni, Cu, Si), YFe_{2 − x}V_x and YCo_{4 − x}Ni_xB. The calculated moments per formula unit described well the experimentally determined magnetizations. By considering the 4f–5d–3d exchange interactions, we evaluate the contributions of local 4f–5d and short range 5d–3d interactions to R 5d and Y 4d band polarizations. The 4f–5d induced polarizations are proportional to the De Gennes factor and are the same for a given R and a similar type structure. The R 5d and Y 4d band polarizations induced by R 5d–T3d or Y 4d–T3d hybridizations are proportional to the number of neighbouring T atoms, to a given R, and their magnetic moments. Previous results on the matter are also discussed.