Vortex-lattice phase transitions in Bi2Sr2CaCu2O8 crystals with different oxygen stoichiometry

被引：390
作者：
Khaykovich, B
Zeldov, E
Majer, D
Li, TW
Kes, PH
Konczykowski, M
机构：
[1] LEIDEN UNIV, KAMERLINGH ONNES LAB, 2300 RA LEIDEN, NETHERLANDS
[2] ECOLE POLYTECH, SOLIDES IRRADIES LAB, CNRS URA 1380, F-91128 PALAISEAU, FRANCE
来源：
PHYSICAL REVIEW LETTERS | 1996年 / 76卷 / 14期
关键词：
D O I：
10.1103/PhysRevLett.76.2555
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The vortex-lattice phase transitions in Bi2Sr2CaCu2O8 crystals with various oxygen stoichiometry are studied using local magnetization measurements. Three new findings are reported: The first-order-phase transition line at elevated temperatures shifts upward for more isotropic overdoped samples. At lower temperatures another sharp transition is observed that results in enhanced bulk pinning in the second magnetization peak region. The two lines merge at a multicritical point at intermediate temperatures forming apparently a continuous phase transition line that is anisotropy dependent.
引用
收藏
页码：2555 / 2558
页数：4
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