High-Pressure Synthesis of Manganese Oxyhydride with Partial Anion Order

Published

July 1, 2016

Author(s)

Cedric Tassel, Yoshinori Goto, Daichi Watabe, Ya Tang, Honcheng Lu, Yoshinori Kuno, Fumitaka Takeiri, Takafumi Yamamoto, Craig Brown, James Hester, Yoji Kobayashi, Hiroshi Kageyama

Abstract

We report the high-pressure synthesis of a manganese oxyhydride LaSrMnO_3.3H_0.7. Neutron and X-ray Rietveld analyses showed this compound adopts the K₂NiF₄ structure, with H^-positioned exclusively at the equatorial site. This result makes a striking contrast to topochemical reductions of LaSrMnO₄ that results in only oxygen-deficient phases down to LaSrMnO_3.5. This suggests high (H₂) pressure plays a key role in stabilizing the oxyhydride phase plays a key role in stabilizing the oxyhydride phase and could offer an opportunity to synthesize other transition metal oxyhydrides. Magnetic susceptibility revealed a spin-glass transition at 24 K due to competing ferromagnetic (Mn²⁺-Mn³⁺) and antiferromagnetic (Mn²⁺-Mn², Mn³⁺-Mn³⁺) interactions.

Citation

Angewandte Chemie-International Edition

Volume

55

Pub Type

Journals

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Keywords

Ruddlesden-Popper Perovskite, Oxyhydride , Mixed-anion, Anion order, neutron diffraction

Citation

Tassel, C. , Goto, Y. , Watabe, D. , Tang, Y. , Lu, H. , Kuno, Y. , Takeiri, F. , Yamamoto, T. , Brown, C. , Hester, J. , Kobayashi, Y. and Kageyama, H. (2016), High-Pressure Synthesis of Manganese Oxyhydride with Partial Anion Order, Angewandte Chemie-International Edition, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=921157 (Accessed October 11, 2024)