Mössbauer study of amorphous BaO−Fe2O3−B2O3 system |
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| Authors: | Osamu Horie Yasuhiko Syono Yasuaki Nakagawa Atsuko Ito Kiyohito Okamura Seishi Yajima |
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| Institution: | The Research Institute for Iron, Steel and Other Metals, Tohoku University, Sendai 980, Japan;Dept. of Physics, Faculty of Science, Ochanomizu University, Otsuka, Bunkyo-ku, Tokyo 112, Japan;The Oarai Branch, The Research Institute for Iron, Steel and Other Metals, Tohoku University, Oarai, Ibaraki-ken 311-13, Japan |
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| Abstract: | HomogeneousBaO?Fe2O3?B2O3 glasses containing maximum Fe2O3 content of 63 mol.% are prepared by splat cooling technique. Mössbauer study reveals that the glass mainly consists of tetrahedral network of Fe3+O4. Mössbauer spectrum of the glass shows a well defined hyperfine structure at low temperatures. Magnetic ordering temperature estimated is about 130 K for the most iron-rich specimen, being much lower than that of the corresponding crystalline phases, BaO;·;Fe2O3 and BaO·;2Fe2O3. The magnetic structure is suggested to be of a short-range antiferromagnetic ordering. |
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