This work was supported by the Hakubi Project funding, MEXT through Grant-in-Aid for Scientific Research A (No. 24248016) and the Young Scientist Grant B (No. 25810040) and JSPS through FIRST Program“ and CREST.
Direct Synthesis of Chromium Perovskite Oxyhydride with a High Magnetic-Transition Temperature†
Article first published online: 12 AUG 2014
© 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Angewandte Chemie International Edition
How to Cite
Tassel, C., Goto, Y., Kuno, Y., Hester, J., Green, M., Kobayashi, Y. and Kageyama, H. (2014), Direct Synthesis of Chromium Perovskite Oxyhydride with a High Magnetic-Transition Temperature. Angew. Chem. Int. Ed.. doi: 10.1002/anie.201405453
- Article first published online: 12 AUG 2014
- Manuscript Received: 20 MAY 2014
- Hakubi Project funding
- MEXT. Grant Numbers: 24248016, 25810040
- high-pressure chemistry;
- mixed anion phases;
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.