EXPERIMENTAL-EVIDENCE FOR A 1ST-ORDER VORTEX-LATTICE-MELTING TRANSITION IN UNTWINNED, SINGLE-CRYSTAL YBA2CU3O7

被引：558

作者：

SAFAR, H ^{[1
]}

GAMMEL, PL ^{[1
]}

HUSE, DA ^{[1
]}

BISHOP, DJ ^{[1
]}

RICE, JP ^{[1
]}

GINSBERG, DM ^{[1
]}

机构：

[1] UNIV ILLINOIS,DEPT PHYS,URBANA,IL 61801

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 69卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.69.824

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on current-voltage measurements in clean, untwinned YBa2Cu3O7 single crystals with pico-volt voltage sensitivity and millikelvin temperature resolution in magnetic fields ranging up to 7 T. We find evidence for a melting transition in the vortex lattice which is hysteretic in both temperature and magnetic field. The measured thermal and magnetic hysteresis widths are related by the local slope of the phase boundary. This strongly supports the picture that, in the clean limit, the melting transition of the Abrikosov vortex lattice is a first-order phase transition.

引用

页码：824 / 827

页数：4

共 21 条

[1] MAGNETIC FLUX-LINE LATTICES AND VORTICES IN THE COPPER-OXIDE SUPERCONDUCTORS [J].