MeV ion irradiation of Co/Cu multilayers

被引:32
作者
Cai, M [1 ]
Veres, T [1 ]
Roorda, S [1 ]
Cochrane, RW [1 ]
Abdouche, R [1 ]
Sutton, M [1 ]
机构
[1] MCGILL UNIV,DEPT PHYS,MONTREAL,PQ H3A 2T8,CANADA
关键词
D O I
10.1063/1.364465
中图分类号
O59 [应用物理学];
学科分类号
摘要
We examine the effect of MeV ion-beam irradiation on the giant magnetoresistance and related interlayer magnetic coupling in sputtered Co/Cu multilayers. At ion doses higher than 10(13)/cm(2), the resistivity of the multilayers increases noticeably, well beyond that measured for pure copper or cobalt films. This increase in resistivity of the multilayers is tentatively ascribed to ion-beam-induced interface disorder. With increasing dose, the magnetic interlayer coupling passes systematically from a mainly antiferromagnetic (AF) coupling to a ferromagnetic one and, in parallel, the giant magnetoresistance (GMR) is progressively destroyed. A linear relationship between the GMR and the volume fraction of AF coupled regions is observed up to an ion dose of 2 x 10(14)/cm(2). (C) 1997 American Institute of Physics.
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页码:5200 / 5202
页数:3
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