Angular dependence of the first-order vortex-lattice phase transition in Bi 2 Sr 2 CaCu 2 O 8
Angular dependence of the first-order vortex-lattice phase transition in Bi 2 Sr 2 CaCu 2 O 8
复制标题
Bi 2 Sr 2 CaCu 2 O 8 中一级涡晶格相变的角度依赖性
DOI：
10.1103/physrevb.55.r8705
复制
发表时间：
1997
影响因子：
3.7
通讯作者：
E. Zeldov
中科院分区：
文献类型：
--
作者：
B. Schmidt;M. Konczykowski;N. Morozov;E. Zeldov
用局域交流磁化率x8中的顺磁峰来识别Bi2Sr2CaCu2O8在不同的直流磁场相对于c轴的倾角下的一级涡旋-晶格相变。过渡场Hm大致遵循二维标度函数Hdccos(U)。对于接近ab平面的场方向，缩放失败。顺磁峰的幅度与磁化Db的跳跃成正比，它不依赖于倾斜角度，直到非常接近ab平面(61°)的构型。由此我们得出结论：跃迁时的熵跳跃DS对面内场的存在不敏感。52314-9#
The paramagnetic peak in the local ac susceptibility x8 is used to identify the first-order vortex-lattice phase transition in Bi2Sr2CaCu2O8 at various tilt anglesu of the dc magnetic field with respect to the c axis. The transition fieldHm follows roughly the two-dimensional scaling function Hdccos(u). The scaling fails for field orientations close to the ab plane. The amplitude of the paramagnetic peak, which is proportional to the jump in magnetizationDB, does not depend on the tilt angle up to configurations very close to the ab plane (61°). From this we conclude that the entropy jump at the transition, Ds, is insensitive to the presence of the in-plane field.@S0163-1829 ~97!52314-9#