Crystal structures of Cr-based magnetic pyroxenes |
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| Authors: | Yoshitaka Matsushita Fujio Izumi Masahiko Isobe Yutaka Ueda |
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| Institution: | 1. Quantum beam Center, National Institute for Materials Science (NIMS), Tsukuba, Ibaraki, Japan;2. NIMS Beamline Station at Spring-8, National Institute for Materials Science (NIMS), Sayo, Hyogo, Japan;3. Institute for Solid State Physics (ISSP), The University of Tokyo, Kashiwa, Chiba, Japan |
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| Abstract: | Crystal structures of the Cr-based germanates: ACrGe2O6 (A = Li and Na) which show the specific magnetic properties, are solved using synchrotron powder-diffraction data at room temperature. Both compounds have isostructure which belongs to monoclinic C2/c with pyroxene-type structure. In both ACrGe2O6 structures, chromium atom forms the magnetic one-dimensional edge-shared CrO6 chain. In the NaCrGe2O6 structure, the shortest Cr?Cr distance and Cr–O–Cr angle are both longer and wider compared to those in the LiCrGe2O6 structure. This behavior may give strong influence to the difference of their magnetic properties. |
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