期刊
PHYSICAL REVIEW B
卷 102, 期 6, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.102.064509
关键词
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资金
- CNPq
- FAPERJ (Rio de Janeiro, Brazil) [E-26/201.915/2019]
- FAPERJ [E-26/202.820/2018, E-26/010/101136/2018]
- National Natural Science Foundation of China [11374346, 11822411, 11961160699, 11874401, 11674406, 11674372]
- Chinese Academy of Sciences (CAS) [XDB07020300, XDB25000000]
- Youth Innovation Promotion Association of CAS [2016004]
- PIBIC-CNPq/UFRJ
Second magnetization peak (SMP) in hole-doped cuprates and iron pnictide superconductors has been widely explored. However, similar feature in the family of electron-doped cuprates is not common. Here, we report the vortex dynamics study in the single crystal of an electron-doped cuprate Pr0.87LaCe0.13CuO4 superconductor using dc magnetization measurements. A second magnetization peak feature in the isothermal M(H) was observed for H parallel to ab planes. On the other hand, no such feature was observed for the H parallel to c axis in the crystal. Using magnetic relaxation data, a detailed analysis of activation pinning energy via collective creep theory suggests an elastic to plastic creep crossover across the SMP. Moreover, for the H parallel to ab, a peak in the temperature dependence of critical current density is also observed near 7 K, which is likely be related to a dimensional crossover [three-dimensional-two dimensional (3D-2D)] associated with the emergence of Josephson vortices at low temperatures. The anisotropy parameter obtained gamma approximate to 8-11 indicates the 3D nature of vortex lattice mainly for the H parallel to c axis. The H-T phase diagrams for H parallel to c and H parallel to ab are presented.
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