Enhancement of low field magnetoresistance in YBa2Cu3O7/Nd0.7Sr0.3MnO3 heterostructures

被引：3

作者：

Dong, ZW ^{[1
]}

Chen, CH ^{[1
]}

Takeuchi, I ^{[1
]}

Rajeswari, M ^{[1
]}

Sharma, RP ^{[1
]}

Venkatesan, T ^{[1
]}

Boettcher, T ^{[1
]}

机构：

[1] UNIV BREMEN,DEPT PHYS,D-28199 BREMEN,GERMANY

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 1997年 / 7卷 / 02期

关键词：

D O I：

10.1109/77.621024

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In order to obtain an enhancement of low field magnetoresistance (MR) in Nd0.7Sr0.3MnO3 (NSMO) films, two kinds of superconducting flux focusing devices made of YBa2Cu3O7 (YBCO) have been fabricated. In the superconducting state, YBCO expels magnetic flux from its interior and focuses the magnetic flux on a bridge of NSMO film. Using such a magnetic ''lens'', at temperatures below 77 K, similar to 900% enhancement in MR was observed. This corresponds to more than 15% change in the MR of NSMO in the presence of a couple of hundred Gauss. In order to successfully integrate high-T-c superconductivity with the magnetoresistive effect, bilayers of YBCO/NSMO were in situ deposited on (100) LaAlO3 substrates by pulsed laser deposition so that the peak resistance temperature (T-p) of NSMO was below the superconducting transition temperature (T-c) of YBCO. X-ray diffraction and Rutherford Backscattering Spectroscopy (RBS) measurements provide evidence of epitaxial growth of YBCO/NSMO heterostructures.

引用

页码：2173 / 2176

页数：4

共 16 条

[1]

BOETTCHER T, 1996, THESIS U MARYLAND

[2]

BOETTSCHER T, UNPUB

[3] MAGNETORESISTANCE IN MAGNETIC MANGANESE OXIDE WITH INTRINSIC ANTIFERROMAGNETIC SPIN STRUCTURE [J].