Direct Synthesis of Chromium Perovskite Oxyhydride with a High Magnetic-Transition Temperature

Tassel, Cédric and Goto, Yoshihiro and Kuno, Yoshinori and Hester, James and Green, M.A. and Kobayashi, Yoji and Kageyama, Hiroshi (2014) Direct Synthesis of Chromium Perovskite Oxyhydride with a High Magnetic-Transition Temperature. Angewandte Chemie International Edition, 53 (39). pp. 10377-10380. ISSN 1433-7851. (doi:https://doi.org/10.1002/anie.201405453) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Official URL
http://doi.org/10.1002/anie.201405453

Abstract

We report a novel oxyhydride SrCrO2H directly synthesized by a high-pressure high-temperature method. Powder neutron and synchrotron X-ray diffraction revealed that this compound adopts the ideal cubic perovskite structure with O2?/H? disorder. Surprisingly, despite the non-bonding nature between Cr?3d?t2g orbitals and the H?1s orbital, it exhibits G-type spin ordering at TN?380?K, which is higher than that of RCrO3 (R=rare earth) and any chromium oxides. The enhanced TN in SrCrO2H with four Cr-O-Cr bonds in comparison with RCr3+O3 with six Cr-O-Cr bonds is reasonably explained by the tolerance factor. The present result offers an effective strategy to tune octahedral tilting in perovskites and to improve physical and chemical properties through mixed anion chemistry.

Item Type: Article
Uncontrolled keywords: chromium; high-pressure chemistry; mixed anion phases; oxyhydrides; perovskites
Subjects: Q Science > QC Physics > QC173.45 Condensed Matter
Q Science > QD Chemistry > QD478 Solid State Chemistry
Divisions: Faculties > Sciences > School of Physical Sciences
Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: Mark Green
Date Deposited: 19 Oct 2015 13:53 UTC
Last Modified: 25 Aug 2017 11:35 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/51077 (The current URI for this page, for reference purposes)
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