| Bi2212单晶本征钉扎的不可逆线 |
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| 引用本文： | 冯双久,李广,李晓光.Bi2212单晶本征钉扎的不可逆线[J].低温物理学报,2005,27(4):360-364. |
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| 作者姓名： | 冯双久 李广 李晓光 |
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| 作者单位： | 信息材料与器件重点实验室(安徽大学),安徽大学物理与材料科学学院,合肥,230039;中国科技大学合肥微尺度物质科学国家实验室,材料科学与工程系,合肥,230026 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)，安徽大学校科研和教改项目 |
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| 摘 要： | 通过输运测量得到了磁场垂直于晶体c轴时Bi2212单晶的不可逆线,发现在2 T附近发生变化趋势的改变,表明Josephson涡旋物质在此处可能存在相变或渡越行为.采用涡旋弯折扩展模型,分别讨论了低场/高温和高场/低温区域的不可逆线的表达式,并采用这些表达式很好拟合了实验得到的对应区域的不可逆线.
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| 关 键 词： | 磁通钉扎 不可逆线 Josephson涡旋 |
| 收稿时间： | 10 26 2004 12:00AM |
| 修稿时间： | 02 25 2005 12:00AM |
IRREVERSIBILITY LINE OF INTRINSIC PINNING IN Bi2212 SINGLE CRYSTAL |
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| FENG SHUANG-JIU,LI-GUANG,LI XIAO-GUANG.IRREVERSIBILITY LINE OF INTRINSIC PINNING IN Bi2212 SINGLE CRYSTAL[J].Chinese Journal of Low Temperature Physics,2005,27(4):360-364. |
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| Authors: | FENG SHUANG-JIU LI-GUANG LI XIAO-GUANG |
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| Institution: | Anhui University |
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| Abstract: | The irreversibility line (IL) with the applied magnetic field perpendicular to the c-axis of crystal in Bi2212 single crystal was obtained by resistivity measurement. It was found that IL shows temperature dependence crossover around 2 T, which impliesthat the Josephson vortex matter may has phase transition or some crossover behavior at that field. IL expressions for low field/high temperature and high field/low temperature regions were deduced, respectively, by using the vortex kink expansion model. The deduced expressions can well reproduce IL obtained in the experimental. |
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| Keywords: | Vortex pinning Irreversibility line Josephson vortex |
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