Plastic vortex creep in YBa2Cu3O7-x crystals

被引：312

作者：

Abulafia, Y

Shaulov, A

Wolfus, Y

Prozorov, R

Burlachkov, L

Yeshurun, Y

Majer, D

Zeldov, E

Wuhl, H

Geshkenbein, VB

Vinokur, VM

机构：

[1] WEIZMANN INST SCI, DEPT CONDENSED MATTER PHYS, IL-76100 REHOVOT, ISRAEL

[2] UNIV KARLSRUHE, D-76021 KARLSRUHE, GERMANY

[3] FORSCHUNGSZENTRUM KARLSRUHE, INST TECH PHYS, D-76021 KARLSRUHE, GERMANY

[4] ETH HONGGERBERG, CH-8093 ZURICH, SWITZERLAND

[5] LD LANDAU THEORET PHYS INST, MOSCOW 117940, RUSSIA

[6] ARGONNE NATL LAB, ARGONNE, IL 60439 USA

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 77卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.77.1596

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Local magnetic relaxation measurements in YBa2Cu3O7-x crystals show evidence for plastic vortex creep associated with the motion of dislocations in the vortex lattice. This creep mechanism governs the vortex dynamics in a wide range of temperatures and fields below the melting line and above the field corresponding to the peak in the ''fishtail'' magnetization. In this range the activation energy U-pl, which decreases with field, drops below the elastic (collective) creep activation energy, U-el, which increases with field. A crossover in flux dynamics from elastic to plastic creep is shown to be the origin of the fishtail in YBa2CU3O7-x.

引用

页码：1596 / 1599

页数：4

共 31 条

[21] Discontinuity of reversible magnetization in untwinned YBCO single crystals at the first order vortex melting transition [J].