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Giant Negative Thermal Expansion in the Iron Perovskite SrCu 3 Fe 4 O 12
Author(s) -
Yamada Ikuya,
Tsuchida Kazuki,
Ohgushi Kenya,
Hayashi Naoaki,
Kim Jungeun,
Tsuji Naruki,
Takahashi Ryoji,
Matsushita Masafumi,
Nishiyama Norimasa,
Inoue Toru,
Irifune Tetsuo,
Kato Kenichi,
Takata Masaki,
Takano Mikio
Publication year - 2011
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.201102228
Subject(s) - disproportionation , perovskite (structure) , crystallography , charge (physics) , mössbauer spectroscopy , thermal expansion , materials science , condensed matter physics , chemistry , physics , thermodynamics , quantum mechanics , biochemistry , catalysis
Big and cold : Strong internal compression of the Sr ion in the novel perovskite SrCu 3 Fe 4 O 12 (see structure) leads to giant negative thermal expansion (NTE) between 170 and 270 K. Mössbauer spectroscopy shows charge disproportionation of Fe IV to Fe III and Fe V below 200 K. Thus, the isoelectric substitution of the A ‐site cation can induce a drastic change of the structural and electronic properties in A Cu 3 Fe 4 O 12 perovskites.