期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 54, 期 41, 页码 12069-12073出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201506456
关键词
density functional calculations; giant magnetoresistance; half-metallicity; magnetic properties; perovskite phases
资金
- NSF-DMREF project [DMR-1435918]
- Danish Research Councils for Independent Research [12-125226]
- DOE BES [DE-AC02-98CH10886]
- Spanish projects [MAT2013-41099-R, RyC-2010-06276]
- [NSF-DMR-0966829]
- [ARO-434603 (DOD-VV911NF-12-1-0172)]
The first transition-metal-only double perovskite compound, Mn2+ Fe-2(3+) Re5+ O-6, with 17 unpaired d electrons displays ferrimagnetic ordering up to 520K and a giant positive magnetoresistance of up to 220% at 5K and 8 T. These properties result from the ferrimagnetically coupled Fe and Re sublattice and are affected by a two-to-one magnetic-structure transition of the Mn sublattice when a magnetic field is applied. Theoretical calculations indicate that the half-metallic state can be mainly attributed to the spin polarization of the Fe and Re sites.
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