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Half – metallic magnetism in light–rare earth nitrides

E. BURZO1,* , N. BUCUR1, H. ALLMAIER2, L. CHIONCEL2,3

Affiliation

  1. Faculty of Physics, Babes-Bolyai University Cluj-Napoca, Romania
  2. Institute of Theoretical Physics, Graz University of Technology, A-8010 Graz, Austria
  3. Department of Physics, University of Oradea, RO-410087 Oradea, Romania

Abstract

Band structure calculations were performed on light-rare earth nitrides. LaN is a semiconductor and CeN shows a metallic-type conduction .We predict half metallicity for RN (R=Pr,Nd,Pm,Sm,Eu) nitrides with a gap for the minority spin and a metallic majority spin channel. The R(4f+5d) and N2p bands hybridize, and as a consequence, N2p anti-parallel polarization to 4f spin moment is induced. The determined spin moments per formula unit are integer numbers, confirming the half-metallicity. The computed results describe rather well the experimental data..

Keywords

Rare-earth nitrides, Band structures, Magnetic properties.

Submitted at: Dec. 13, 2007
Accepted at: Feb. 18, 2008

Citation

E. BURZO, N. BUCUR, H. ALLMAIER, L. CHIONCEL, Half – metallic magnetism in light–rare earth nitrides, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 2, pp. 389-395 (2008)