Giant magnetoresistance in the half-metallic double-perovskite ferrimagnet Mn2FeReO6.
Angew Chem Int Ed Engl
; 54(41): 12069-73, 2015 Oct 05.
Article
em En
| MEDLINE
| ID: mdl-26235744
ABSTRACT
The first transition-metal-only double perovskite compound, Mn(2+) 2 Fe(3+) Re(5+) O6 , with 17 unpaired dâ
electrons displays ferrimagnetic ordering up to 520â
K and a giant positive magnetoresistance of up to 220 % at 5â
K and 8â
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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Ano de publicação:
2015
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Article