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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
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201506456
Subject(s) - ferrimagnetism , magnetoresistance , condensed matter physics , giant magnetoresistance , perovskite (structure) , metal , colossal magnetoresistance , materials science , transition metal , half metal , unpaired electron , electron , spin polarization , magnetization , magnetic field , chemistry , ferromagnetism , crystallography , spintronics , physics , catalysis , metallurgy , 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.