THOUSANDFOLD CHANGE IN RESISTIVITY IN MAGNETORESISTIVE LA-CA-MN-O FILMS

被引：4787
作者：
JIN, S
TIEFEL, TH
MCCORMACK, M
FASTNACHT, RA
RAMESH, R
CHEN, LH
机构：
[1] BELLCORE,RED BANK,NJ 07701
[2] KAOHSIUNG POLYTECH INST,TA HSU HSIANG,TAIWAN
来源：
SCIENCE | 1994年 / 264卷 / 5157期
关键词：
D O I：
10.1126/science.264.5157.413
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
A negative isotropic magnetoresistance effect more than three orders of magnitude larger than the typical giant magnetoresistance of some superlattice films has been observed in thin oxide films of perovskite-like La0.67Ca0.33MnOx. Epitaxial films that are grown on LaAlO3 substrates by laser ablation and suitably heat treated exhibit magnetoresistance values as high as 127,000 percent near 77 kelvin and approximately 1300 percent near room temperature. Such a phenomenon could be useful for various magnetic and electric device applications if the observed effects of material processing are optimized. Possible mechanisms for the observed effect are discussed.
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页码：413 / 415
页数：3
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