Ferromagnetism below the Stoner limit in La-doped SrB_6

Preprint

31 January 2000

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/0001437

Abstract

Spin-polarized band calculations for LaSr_7B_{48} show a weak ferro-magnetic state. This is despite a low density-of-states (DOS) and a low Stoner factor. The reason for the magnetic state is found to be associated with a gain in potential energy in addition to the exchange energy, as a spin-splitting is imposed. An impurity like La DOS is essential for this effect. It makes a correction to the Stoner factor, and provides an explanation of the recently observed weak ferro-magnetism in doped hexaborides.

Keywords

DENSITY OF STATES
FERRO MAGNETISM
SPIN POLARIZED
FERROMAGNETISM
STONER LIMIT
DOPED SRB_6
WEAK FERRO

All Related Versions

Version 1, 2000-01-31, ArXiv
Published version: Physical Review Letters, 85 (1), 186.

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