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Giant Magnetoresistance in the Half‐Metallic Double‐Perovskite Ferrimagnet Mn 2 FeReO 6
Author(s) -
Li ManRong,
Retuerto Maria,
Deng Zheng,
Stephens Peter W.,
Croft Mark,
Huang Qingzhen,
Wu Hui,
Deng Xiaoyu,
Kotliar Gabriel,
SánchezBenítez Javier,
Hadermann Joke,
Walker David,
Greenblatt Martha
Publication year - 2015
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201506456
Subject(s) - ferrimagnetism , magnetoresistance , condensed matter physics , perovskite (structure) , giant magnetoresistance , materials science , colossal magnetoresistance , metal , transition metal , electron , magnetization , magnetic field , chemistry , crystallography , physics , metallurgy , catalysis , biochemistry , quantum mechanics
The first transition‐metal‐only double perovskite compound, Mn 2+ 2 Fe 3+ Re 5+ O 6 , with 17 unpaired d electrons displays ferrimagnetic ordering up to 520 K and a giant positive magnetoresistance of up to 220 % at 5 K 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.