OBSERVATION OF THE WOHLLEBEN EFFECT IN YBA2CU3O7-DELTA SINGLE-CRYSTALS

被引：82

作者：

RIEDLING, S

BRAUCHLE, G

LUCHT, R

ROHBERG, K

VONLOHNEYSEN, H

CLAUS, H

ERB, A

MULLERVOGT, G

机构：

[1] KERNFORSCHUNGSZENTRUM KARLSRUHE,INST TECH PHYS,D-76021 KARLSRUHE,GERMANY

[2] UNIV ILLINOIS,DEPT PHYS,CHICAGO,IL 60680

[3] UNIV KARLSRUHE,FAK PHYS,KRISTALL & MAT LAB,D-76128 KARLSRUHE,GERMANY

来源：

PHYSICAL REVIEW B | 1994年 / 49卷 / 18期

关键词：

D O I：

10.1103/PhysRevB.49.13283

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

During systematic low-field magnetization measurements on high-quality single crystals of YBa2Cu3O7-delta we discovered several crystals with a paramagnetic contribution to the field-cooled magnetization. This magnetization saturates at very low fields. It is attributed to spontaneous current loops caused by pi junctions which are aligned in small external fields (Wohlleben effect). The effect is only seen with the field parallel to the c axis, demonstrating that the spontaneous currents are confined to the CuO2 planes.

引用

页码：13283 / 13286

页数：4

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