（Bi，Pb）2Sr2CaCu2Oy单晶的磁通钉扎研究

HFCAS OpenIR

	（Bi，Pb）2Sr2CaCu2Oy单晶的磁通钉扎研究
其他题名	FLUX PINNING STUDY（Bi,Pb）2Sr2CaCu2Oy SINGLE CRYSTAL
	2009-01-01
发表期刊	低温物理学报
ISSN	1000-3258
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．
其他摘要	To study the pinning mechanism in heavily Pb-doped Bi2 Sr2 CaCu2O8 （（ 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 and bulking pinning force. The results show that the fishtail effect in （ Bi, Pb）-2212 single crystal originates from stronger bulk pinning caused by anisotropy depression induced from heavily Pb doping. Additionally, at high temperature, the surface barrier is more important for magnetic properties.
关键词	（Bi Pb）-2212单晶鱼尾效应磁通钉扎磁通蠕动
收录类别	CSCD
语种	中文
CSCD记录号	CSCD:3654326
引用统计
文献类型	期刊论文
条目标识符	http://ir.hfcas.ac.cn:8080/handle/334002/51126
专题	中国科学院合肥物质科学研究院
推荐引用方式 GB/T 7714	. （Bi，Pb）2Sr2CaCu2Oy单晶的磁通钉扎研究[J]. 低温物理学报,2009,000.
APA	(2009).（Bi，Pb）2Sr2CaCu2Oy单晶的磁通钉扎研究.低温物理学报,000.
MLA	"（Bi，Pb）2Sr2CaCu2Oy单晶的磁通钉扎研究".低温物理学报 000(2009).