INCREASES IN GIANT MAGNETORESISTANCE BY ION IRRADIATION

被引:61
作者
KELLY, DM
SCHULLER, IK
KORENIVSKI, V
RAO, KV
LARSEN, KK
BOTTIGER, J
GYORGY, EM
VANDOVER, RB
机构
[1] ROYAL INST TECHNOL,DEPT CONDENSED MATTER PHYS,S-10044 STOCKHOLM 70,SWEDEN
[2] AARHUS UNIV,INST PHYS & ASTRON,DK-8000 AARHUS,DENMARK
[3] AT&T BELL LABS,MURRAY HILL,NJ 07974
来源
PHYSICAL REVIEW B | 1994年 / 50卷 / 05期
关键词
D O I
10.1103/PhysRevB.50.3481
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We have studied the effect of 500-keV Xe+ irradiation on the structure, magnetotransport, and magnetic properties of sputtered Fe/Cr multilayers. Initially, with increasing dosage the giant magnetoresistance (GMR) increases with a concomitant increase in the interfacial roughness as indicated by changes in the low-angle x-ray-diffraction spectra. At doses higher than 1 X 10(13) ions/cm2, the value of the GMR progressively decreases, corresponding to progressively increasing regions of the film which are ferromagnetically coupled. The resulting structural disorder increases the overall electronic scattering rate and hence the electrical resistance at these higher doses. These results demonstrate that increased interfacial scattering enhances the GMR and thus plays an important role in the mechanism determining the GMR in Fe/Cr superlattices.
引用
收藏
页码:3481 / 3484
页数:4
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