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Mössbauer study of CaFeO3 under external high—Pressure |
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| Authors: | S Nasu T Abe K Yamamoto S Endo M Takano Y Takeda |
| Institution: | (1) Research Center for Extreme Materials and Faculty of Engineering Science, 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 |
| Abstract: | 57Fe Mössbauer and X-ray diffraction measurements have been performed on a perovskite CaFeO3 under external high pressure upto 50 GPa at room temperature using a diamond anvil cell. Above 29 GPa the57Fe magnetic hyperfine splitting appears superimposing with usual paramagnetic pattern of CaFeO3. Magnitude of hyperfine field is 16 T and much smaller than 33 T of typical Fe4+ in SrFeO3 suggesting a transition from high-spin S=2 to low-spin S=1 state in CaFeO3. |
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