| (Bi,Pb)2 Sr2 CaCu2Oy单晶的磁通钉扎研究 |
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| 引用本文： | 张莉,刘果红,丁世英,孙玉平,朱雪斌.(Bi,Pb)2 Sr2 CaCu2Oy单晶的磁通钉扎研究[J].低温物理学报,2009,31(3):216-220. |
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| 作者姓名： | 张莉 刘果红 丁世英 孙玉平 朱雪斌 |
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| 作者单位： | 安徽建筑工业学院,数理系,合肥,230022;南京大学,物理系,南京,210093;中国科学院固体物理研究所,材料物理重点实验室,合肥,230031 |
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| 基金项目： | 安徽建筑工业学院博士科研启动基金资助的课题~~ |
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| 摘 要： | 我们通过对重Pb掺杂的Bi-2212((Bi,Pb)-2212)单晶磁化性质的测量来研究磁通钉扎性能,发现样品中存在与温度有明显依赖关系的鱼尾效应,且此鱼尾效应不仅体现在磁滞洄线上,还体现在不同磁场下零场冷的M～T曲线的交叠上.同时我们采用非线性磁通蠕动模型,并考虑表面位垒和体钉扎的影响,运用数值模拟分析了样品的磁化性质,结果表明(Bi,Pb)-2212单晶的鱼尾效应源于重Pb掺杂导致样品各向异性的降低所引起的强的体钉扎效应,而高温的磁化性质主要取决于表面位垒的作用.
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| 关 键 词： | (Bi-Pb)-2212单晶 鱼尾效应 磁通钉扎 磁通蠕动 |
FLUX PINNING STUDY ON A (Bi,Pb)_2Sr_2CaCu_2O_y SINGLE CRYSTAL |
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| ZHANG Li LIU Guo-hong DING Shi-ying SUN Yu-ping ZHU Xue-bin.FLUX PINNING STUDY ON A (Bi,Pb)_2Sr_2CaCu_2O_y SINGLE CRYSTAL[J].Chinese Journal of Low Temperature Physics,2009,31(3):216-220. |
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| Authors: | ZHANG Li LIU Guo-hong DING Shi-ying SUN Yu-ping ZHU Xue-bin |
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| Institution: | ZHANG Li1 LIU Guo-hong1 DING Shi-ying2 SUN Yu-ping3 ZHU Xue-bin3 1Department of Mathematics , Physics,Anhui University of Architecture Industry,Hefei 230022 2Department of Physics,Nanjing University,Nanjing 210093 3Key Laboratory of Materials,Institute of Solid State Physics,Chinese Academy of Sciences,Hefei 230031 |
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| Abstract: | To study the pinning mechanism in heavily Pb-doped Bi2Sr2CaCu2O8 ((Bi,Pb)-2212) single crystals,magnetic measurements have been carried out. It is observed that the fishtail effect in (Bi,Pb)-2212 single crystal is dependent on temperature,and it manifests itself both on a single magnetic hysteresis loop and on the crossover of ZFC M~T curves under different fields. The experimental results are analyzed through numerical simulation using non-linear flux creep model of cooperation effects of surface barrier ... |
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