57Fe Mössbauer study of SrFeO3 under ultra-high pressure |
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| Authors: | S Nasu T Abe K Yamamoto S Endo M Takano Y Takeda |
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| Institution: | (1) Department of Material Physics, Faculty of Engineering Science and Research Center for Extreme Materials, Osaka University, 560 Toyonaka, Osaka, Japan;(2) Institute for chemical Research, Kyoto University, 611 Uji, Kyoto-fu, Japan;(3) Faculty of Engineering, Mie University, 514 Mie, Japan |
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| Abstract: | 57Fe Mössbauer absorption spectra under ultra-high pressure up to 53 GPa have been measured using a diamond anvil cell for SrFeO2.97 which is one of the typical Fe4+ oxides having a cubic perovskite structure. External high pressure up to 53 GPa makes no indication of structural transformation and does not show any change in valence state of iron, however the Néel temperature of 131 K at 0 GP increases to 300 K and the57Fe magnetic hyperfine field decreases from 32.9 T at 0 GPa and 6.5 K to 23.3 T at 53 GPa and 300 K. |
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