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Contrasting Magnetic Behaviors in Rhodium‐ and Ruthenium‐Doped Cubic Perovskite SrFeO 3 : Nearly Ferromagnetic Metal versus Spin‐Glass Insulator
Author(s) -
Kinoshita Masataka,
Sakai Hideaki,
Hayashi Naoaki,
Tokura Yoshinori,
Takano Mikio,
Ishiwata Shintaro
Publication year - 2016
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.201608222
Subject(s) - ferromagnetism , antiferromagnetism , condensed matter physics , superexchange , materials science , doping , metal , perovskite (structure) , rhodium , electrical resistivity and conductivity , paramagnetism , spin glass , chemistry , crystallography , physics , metallurgy , catalysis , biochemistry , quantum mechanics
The effects of Rh and Ru doping for SrFeO 3 , a helimagnetic metal with a cubic perovskite structure, are studied by magnetic and resistivity measurements. Although SrRhO 3 is a paramagnetic metal and SrRuO 3 is a ferromagnetic one, the Rh doping induces a nearly ferromagnetic metallic state, whereas the Ru doping induces a spin‐glass insulating state. Mössbauer measurements evidence a marked difference between SrFe 0.8 Rh 0.2 O 3 and SrFe 0.8 Ru 0.2 O 3 in the formal valences of Fe, which are estimated to be 4+ and 3.75+, respectively. The contrasting magnetic behaviors of Rh‐ and Ru‐doped SrFeO 3 are discussed in terms of the subtle balance between the double‐exchange ferromagnetism and the superexchange antiferromagnetism.