Polarized neutron reflectivity characterization of weakly coupled Co/Cu multilayers

J. A. Borchers*, J. A. Dura, C. F. Majkrzak, Shih-ying Hsu, R. Lolee, W. P. Pratt, J. Bass


研究成果: Conference article同行評審

14 引文 斯高帕斯(Scopus)


Room temperature resistivity studies on (1 1 1) Co(6 nm)/Cu(6 nm) multilayers with weak interlayer coupling yield a giant magnetoresistance (GMR) of several percent for the as-prepared state relative to the saturated (i.e., large magnetic field) state. After application of a magnetic field, the magnetoresistance for the coercive state is only half to two-thirds as large. Using specular and off-specular polarized neutron reflectivity, we have determined the magnetic structure of these multilayers in the as-prepared and coercive states. Measurements of as-prepared samples show a strong antiparallel correlation of in-plane ferromagnetic Co domains across the Cu interlayers. At the coercive field, the Co domains are uncorrelated along the growth direction. Thus, the larger GMR for the as-prepared state arises from long-range antiparallel magnetic order along the growth-axis direction that is destroyed upon application of a magnetic field. For both the as-prepared and coercive states, the size of the in-plane ferromagnetic domains is approximately 0.5-1.5 μm. These domains give rise to pronounced diffuse scattering in rocking curves through the antiferromagnetic peak position.

頁(從 - 到)162-166
期刊Physica B: Condensed Matter
出版狀態Published - 6月 2000
事件6th International Conference on Surface X-ray and Neutron Scattering (SXNS-6) - Noordwijkerhout, Neth
持續時間: 12 9月 199917 9月 1999


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