| The Mssbauer Effect of Y-Ba-Cu-Fe-O Superconductive Oxide |
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| 引用本文： | 夏思科,马如璋,曹国辉,李正文,冯永荣.The Mssbauer Effect of Y-Ba-Cu-Fe-O Superconductive Oxide[J].材料科学技术学报,1989,5(6):434-436. |
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| 作者姓名： | 夏思科 马如璋 曹国辉 李正文 冯永荣 |
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| 作者单位： | University of Science and Technology Beijing China. To whom correspondence should be addressed，University of Science and Technology Beijing China，University of Science and Technology Beijing China，University of Science and Technology Beijing China，University of Science and Technology Beijing China |
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| 摘 要： | We have studied the Mossbauer effect ofYBa_2Cu_(2.88)Fe_(0.12)O_(7-x) superconductive oxide from78 to 273K. Two minima of recoilless fractionand Debye temperature were found near 110K and220K. It means that lattice softening happenednear these two temperatures. We also observedminima of isomer shift near 110K and quadrupolesplitting increase when temperature is lowerthan 110K. We suggest that lattice softeningwould lead to the displacement of oxygen atoms.This may be relative to superconductivetransition.
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| 收稿时间： | 1989-11-28 |
The Mssbauer Effect of Y-Ba-Cu-Fe-O Superconductive Oxide |
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| XIA Sike,MA Ruzhang,CAO Guohui,LI Zhengwen,FENG Yongrong University of Science and Technology,Beijing,China. To whom correspondence should be addressed..The Mssbauer Effect of Y-Ba-Cu-Fe-O Superconductive Oxide[J].Journal of Materials Science & Technology,1989,5(6):434-436. |
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| Authors: | XIA Sike MA Ruzhang CAO Guohui LI Zhengwen FENG Yongrong University of Science and Technology Beijing China To whom correspondence should be addressed |
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| Abstract: | We have studied the Mossbauer effect of YBa_2Cu_(2.88)Fe_(0.12)O_(7-x) superconductive oxide from 78 to 273K. Two minima of recoilless fraction and Debye temperature were found near 110K and 220K. It means that lattice softening happened near these two temperatures. We also observed minima of isomer shift near 110K and quadrupole splitting increase when temperature is lower than 110K. We suggest that lattice softening would lead to the displacement of oxygen atoms. This may be relative to superconductive transition. |
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| Keywords: | Y-Ba-Cu-Fe-O superconductor Mossbauer effect lattice softening |
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