OBSERVATION OF VORTEX LATTICE MELTING IN TWINNED YBA2CU3O7-X USING NEUTRONSMALL-ANGLE SCATTERING
OBSERVATION OF VORTEX LATTICE MELTING IN TWINNED YBA2CU3O7-X USING NEUTRONSMALL-ANGLE SCATTERING
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利用中子小角散射观察孪晶 YBA2CU3O7-X 中的涡旋晶格熔化
DOI：
10.1103/physrevb.57.14511
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发表时间：
1998
影响因子：
3.7
通讯作者：
H. Mook
中科院分区：
文献类型：
--
作者：
C. Aegerter;S. T. Johnson;W. Nuttall;S. Lloyd;M. Wylie;M. P. Nutley;E. Forgan;R. Cubitt;Stephen Lee;D. Paul;M. Yethiraj;H. Mook
用中子小角散射方法研究了重孪晶YBa_2Cu_3 O_（72）x中磁通线晶格的性质。据发现，衍射信号消失在温度远低于Tc，与熔化的磁通晶格。熔化线的形状是一致的林德曼标准和缩放预期的涡旋玻璃化转变与超导参数从三维XY模型。通过对c轴施加不同角度的磁场，研究了孪晶面对涡旋晶格结构及其熔化的影响。最近的比热测量结果进行了比较类似的晶体。@S0163-1829~98！03022-7#
A neutron small-angle scattering study of the flux-line lattice in heavily twinned YBa2Cu3O72x is presented. It is found that the diffraction signal disappears at temperatures well below Tc , associated with a melting of the flux lattice. The shape of the melting line is consistent with both a Lindemann criterion and the scaling expected for a vortex-glass transition with the superconducting parameters from the three-dimensional XY model. The influence of twin planes on the structure of the vortex lattice and its melting is studied by applying the field at different angles to the c axis. The results are compared with recent specific heat measurements on similar crystals. @S0163-1829~98!03022-7#