Giant Negative Thermal Expansion in the Iron Perovskite SrCu3Fe4O12

Giant Negative Thermal Expansion in the Iron Perovskite SrCu3Fe4O12

Big and cold: Strong internal compression of the Sr ion in the novel perovskite SrCu3Fe4O12 (see structure) leads to giant negative thermal expansion (NTE) between 170 and 270 K. Mössbauer spectroscopy shows charge disproportionation of FeIV to FeIII and FeV below 200 K. Thus, the isoelectric substi...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Angewandte Chemie International Edition 2011-07, Vol.50 (29), p.6579-6582
Hauptverfasser: 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
Format: Artikel
Sprache:eng
Schlagworte:
charge disproportionation
high-pressure chemistry
Mössbauer spectroscopy
negative thermal expansion
perovskite phases
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:Big and cold: Strong internal compression of the Sr ion in the novel perovskite SrCu3Fe4O12 (see structure) leads to giant negative thermal expansion (NTE) between 170 and 270 K. Mössbauer spectroscopy shows charge disproportionation of FeIV to FeIII and FeV below 200 K. Thus, the isoelectric substitution of the A‐site cation can induce a drastic change of the structural and electronic properties in ACu3Fe4O12 perovskites.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.201102228