| Co,Zn元素对YBa2Cu3O7-δ的不同的掺杂效应 |
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| 引用本文： | 何振辉,陈祖耀,张酣,张其瑞. Co,Zn元素对YBa2Cu3O7-δ的不同的掺杂效应[J]. 物理学报, 1989, 38(1): 60-67 |
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| 作者姓名： | 何振辉 陈祖耀 张酣 张其瑞 |
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| 作者单位： | (1)中国科学技术大学物理系; (2)中国科学技术大学物理系,中国高等科学技术中心(世界实验室)凝聚态与辐射物理分中心; (3)中国科学技术大学应用化学系 |
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| 基金项目： | 国家自然科学基金;博士点基金部分资助的课题 |
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| 摘 要： | 对单相掺杂样品YBa2Cu3-xCoxOy (x=0.00,0.025,0.05,0.075,0.10,0.125,0.15,0.20,0.25,O.275,0.30,0.325,0.35,0.375,0.40)和YBa2Cu3-xZnxOy(x=O.025,0.05,0.075,0.10,0.15,0.20,0.30)作了室温下的关键词：
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| 关 键 词： | Co Zn YBa2Cu3O7－δ 掺杂效应 |
| 收稿时间： | 1988-04-26 |
THE DIFFERENCE OF DOPING EFFECTS BETWEEN YBa2Cu3-xCoxOy AND YBa2Cu3-xZnxOy |
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| HE ZHEN-HUI,CHEN ZU-YAO,ZHANG HAN and ZHANG QI-RUI. THE DIFFERENCE OF DOPING EFFECTS BETWEEN YBa2Cu3-xCoxOy AND YBa2Cu3-xZnxOy[J]. Acta Physica Sinica, 1989, 38(1): 60-67 |
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| Authors: | HE ZHEN-HUI CHEN ZU-YAO ZHANG HAN ZHANG QI-RUI |
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| Abstract: | The measurements of X-ray diffraction, d.c. resistance versus temperature and Hall coefficients at low temperature have been performed for YBa2Cu3-xMxOy systems. (x = 0.00, 0.025,0.05,0.075,0.10,0.125,0.15,0.20,0.25,0.275,0.30,0.325,0.35,0.375,0.40 for M = Co; x=0.025,0.05,0.075,0.10,0.15,0.20,0.30 for M = Zn)The crystallographic data show that an orthorhombic-tetragonal phase transition takes place as Co content increases,while the crystal structure exhibit drastic changes with Zn content. The measurement of resistances indicates that a metal-semiconductor transition occurs at certain x for Co dopant hut not found for Zn dopant. The hole carrier concentration raduces with Co content monotoneous-iy but varies nonmonotoneously with Zn content, giving a maximum at about x= 0.15 The concepts of localization and acceptor are used to explain these phenomena. The suppression of Tc for both systems is discussed with various possible suppression mechanisms. |
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