INVESTIGADORES
DI NAPOLI Solange Mariel
artículos
Título:
Magnetic Order in RMn2Ge2 (R=Y,Ca) compounds and their solid solutions with LaMn2Ge2
Autor/es:
S. DI NAPOLI; A. M. LLOIS; G. BIHLMAYER; S. BLÜGEL
Revista:
PHYSICAL REVIEW B - CONDENSED MATTER AND MATERIALS PHYSICS
Editorial:
American Physical Society
Referencias:
Lugar: Maryland; Año: 2007 vol. 75 p. 1044061 - 1044066
ISSN:
0163-1829
Resumen:
We present a systematic study of the stability of the collinear and noncollinear magnetic states of RMn2Ge2 (R=Y,Ca) compounds as a function of the lattice parameter so as to simulate alloying with La, using density functional theory calculations. The results allow us to discriminate between chemical and structural factors that determine the magnetic properties of these systems. We find that, to a large extent, the magnetic moments aredetermined by the interatomic Mn-Mn distance, given by the size of the substitutional atom. We also find that the different magnetic structures appearing along the phase diagrams are to be mainly ascribed to the interstitial electronic density related to the divalent or trivalent character of the R atom.
