GIANT MAGNETORESISTANCE AT MICROWAVE-FREQUENCIES

被引：54

作者：

DOMINGUEZ, M

BHAGAT, SM

LOFLAND, SE

RAMACHANDRAN, JS

XIONG, GC

JU, HL

VENKATESAN, T

GREENE, RL

机构：

[1] UNIV MARYLAND,CTR SUPERCONDUCT RES,COLLEGE PK,MD 20742

[2] UNIV CADIZ,DEPT CONDENSED MATTER PHYS,E-11510 PUERTO REAL,SPAIN

[3] BEIJING UNIV,DEPT PHYS,BEIJING 100871,PEOPLES R CHINA

[4] BEIJING UNIV,NATL MESOSCOP PHYS LAB,BEIJING 100871,PEOPLES R CHINA

[5] UNIV MARYLAND,DEPT ELECT ENGN,COLLEGE PK,MD 20742

来源：

EUROPHYSICS LETTERS | 1995年 / 32卷 / 04期

关键词：

D O I：

10.1209/0295-5075/32/4/011

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the first measurement of giant magnetoresistance at 10 GHz in a bulk ceramic sample of Nd0.7Sr0.3MnO3. From the surface resistance data, we deduce that the magnetoresistance, [rho(mu W)(0) - rho(mu W)(B)]/rho(mu W)(0) at 1.2 T, has a peak value of approximately 90% at 215 K. The microwave studies are supplemented by data on low-field (less than or equal to 3.5 mT) d.c. magnetization and d.c. resistivity. From the magnetization data, we find that T-c = (219 +/- 2) K. The zero-field microwave loss peaks at T-p = (216 +/- 2) K. The field dependence of the microwave absorption suggests that these materials can prove to be extremely useful in designing microwave devices.

引用

页码：349 / 353

页数：5

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