Disorder effects in half-metallic Sr2FeMoO6 single crystals

Applied Physics Letters

Volumn 94, Issue 1, 2009, Pages

  Panguluri, Raghava P ^a   Xu, Sheng ^b   Moritomo, Yutaka ^c   Solovyev, I V ^d   Nadgorny, B ^a  

^a WAYNE STATE UNIVERSITY   (United States)

^b NAGOYA UNIVERSITY   (Japan)

^c UNIVERSITY OF TSUKUBA   (Japan)

^d NATIONAL INSTITUTE FOR MATERIALS SCIENCE   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

CRYSTALS; MAGNETIC PROPERTIES; METALLIC SOAPS; PEROVSKITE; POLARIZATION; SPIN DYNAMICS; SPIN POLARIZATION; STRONTIUM COMPOUNDS;

ANDREEV REFLECTIONS; ANTISITE DISORDERS; CRYSTALLINE STRUCTURES; DISORDER EFFECTS; DOUBLE PEROVSKITES; LOCAL SPIN DENSITY APPROXIMATIONS; SITE DISORDERS; SPIN POLARIZED;

SINGLE CRYSTALS;

EID: 58149513245     PISSN: 00036951     EISSN: None     Source Type: Journal    
DOI: 10.1063/1.3058441     Document Type: Article

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21. Note, however, that the PCAR technique is not sensitive to the sign of P. According to the LSDA calculations, the spin polarization for the degree of B -site disorder of 12.5% is positive, in contrast to the negative spin polarization for the perfect crystal. This indicates that at some concentration of the B -site defects, the spin polarization may change sign and thus the dependence of P on the degree of disorder may not be monotonic. Note that, while the (linear) extrapolation to a perfect crystal shown here gives higher spin polarization (in excess of 80%), we do not have direct evidence that such behavior will persist all the way to the lower degrees of disorder.