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High‐Pressure Synthesis of Manganese Oxyhydride with Partial Anion Order
Author(s) -
Tassel Cedric,
Goto Yoshinori,
Watabe Daichi,
Tang Ya,
Lu Honcheng,
Kuno Yoshinori,
Takeiri Fumitaka,
Yamamoto Takafumi,
Brown Craig M.,
Hester James,
Kobayashi Yoji,
Kageyama Hiroshi
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.201605123
Subject(s) - manganese , antiferromagnetism , crystallography , ion , ferromagnetism , hydride , chemistry , rietveld refinement , phase transition , transition metal , phase (matter) , inorganic chemistry , metal , crystal structure , condensed matter physics , physics , catalysis , organic chemistry
The high‐pressure synthesis of a manganese oxyhydride LaSrMnO 3.3 H 0.7 is reported. Neutron and X‐ray Rietveld analyses showed that this compound adopts the K 2 NiF 4 structure with hydride ions positioned exclusively at the equatorial site. This result makes a striking contrast to topochemical reductions of LaSrMnO 4 that result in only oxygen‐deficient phases down to LaSrMnO 3.5 . This suggests that high H 2 pressure plays a key role in stabilizing the oxyhydride phase, offering an opportunity to synthesize other transition‐metal oxyhydrides. Magnetic susceptibility revealed a spin‐glass transition at 24 K that is due to competing ferromagnetic (Mn 2+ –Mn 3+ ) and antiferromagnetic (Mn 2+ –Mn 2 , Mn 3+ –Mn 3+ ) interactions.
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