MAGNETORESISTANCE EFFECT OF LA0.72CA0.25MNOZ/YBA2CU3OY/LA0.72CA0.25MNOZ TRILAYERED FILMS

被引：83

作者：

CHAHARA, K

OHNO, T

KASAI, M

KANKE, Y

KOZONO, Y

机构：

[1] Hitachi Research Laboratory, Hitachi, Ltd.

来源：

APPLIED PHYSICS LETTERS | 1993年 / 62卷 / 07期

关键词：

D O I：

10.1063/1.108577

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The magnetoresistance (MR) effects of La0.72Ca0.25MnOz (LCMO) magnetic films and LCMO/YBa2Cu3Oy (YBCO)/LCMO trilayered films were studied. The LCMO films have an MR ratio of -4% when applying 1 T at 77 K and this value is independent of the film thickness from 1500 to 4500 angstrom. In contrast to that, the MR ratio for LCMO/YBCO/LCMO films depends on the thickness of the YBCO layer and is more than 1.5 times as large as that for LCMO films when the thickness of the YBCO layer is less than 2500 angstrom. These results imply that the magnetic spin interaction between the two LCMO layers may exist through the normal-conductive state YBCO layer.

引用

页码：780 / 782

页数：3

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