Critical Current Density,Vortex Pinning,and Phase Diagram in the NaCl-Type Superconductors InTe_(1-x)Se_(x)(x=0,0.1,0.2)

于林超; 黄嵩; 邢相灼; 易晓磊; 孟炎; 周楠; 施智祥; 刘晓兵

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Critical Current Density,Vortex Pinning,and Phase Diagram in the NaCl-Type Superconductors InTe_(1-x)Se_(x)(x=0,0.1,0.2)

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Research of vortex properties in type-Ⅱsuperconductors is of great importance for potential applications and fundamental physics.Here,we present a comprehensive study of the critical current density Jc,vortex pinning,and phase diagram of Na Cl-type In Te_(1-x)Se_(x)(x=0,0.1,0.2)superconductors synthesized by high-pressure technique.Our studies reveal that the values of Jc calculated by the Bean model exceed 10^(4)A/cm^(2)in the In Te_(1-x)Se_(x)system,signifying good potential for applications.The magnetic hysteresis loops(MHLs)show an asymmetric characteristic at various degrees,which is associated with the surface barrier.Intriguingly,a rare phenomenon in which the second magnetization peak in the MHLs occurs only in the field-descending branch is detected in In Te_(0.9)Se_(0.1).Such an anomalous behavior has not been observed before and can be described by considering the respective roles of the surface barrier and bulk pinning in the field-ascending and field-descending branches.By analyzing the pinning force density versus reduced field,the pinning mechanisms are studied in detail in the framework of the Dew-Hughes model.Finally,combining the results of resistivity and magnetization measurements,the vortex phase diagrams are constructed and discussed.

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《中国物理快报：英文版》 |2023年第3期|49-55|共7页
作者
于林超; 黄嵩; 邢相灼; 易晓磊; 孟炎; 周楠; 施智祥; 刘晓兵;
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作者单位

School of Physics and Physical Engineering;

Qufu Normal University;

Qufu 273165;

China;

Advanced Research Institute of Multidisciplinary Sciences;

Qufu Normal University;

Qufu 273165;

China;

College of Physics and Electronic Engineering;

Xinyang Normal University;

Xinyang 464000;

China;

Department of Physics;

Jining University;

Qufu 273155;

China;

Key Laboratory of Materials Physics;

Institute of Solid State Physics;

HFIPS;

Chinese Academy of Sciences;

Hefei 230031;

China;

School of Physics;

Southeast University;

Nanjing 211189;

China;

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原文格式 PDF
正文语种 chi
中图分类凝聚态物理学;
关键词
vortex; magnetization; pinning;

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Critical Current Density,Vortex Pinning,and Phase Diagram in the NaCl-Type Superconductors InTe_(1-x)Se_(x)(x=0,0.1,0.2)

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