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

E. Burzo (1) , L. Chioncel (2) , R. Tetean (3) , Olivier Isnard (4)

1 Faculty of Physics
2 Institute of Physics, University of Augsburg,
3 UBB - Babes-Bolyai University [Cluj-Napoca]
4 NEEL - MRS - Matériaux, Rayonnements, Structure

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 GdCo2 - xAx (A = Ni, Cu, Si), YFe2 - xVx and YCo4 - xNixB. 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.

Domaines: Science des matériaux [cond-mat.mtrl-sci]

E. Burzo, L. Chioncel, R. Tetean, Olivier Isnard. On the R 5d band polarization in rare-earth-transition metal compounds. Journal of Physics: Condensed Matter, 2011, 23, pp.6001. ⟨10.1088/0953-8984/23/2/026001⟩. ⟨hal-00978119⟩