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Dependence of giant magnetoresistance on microstructures in ion-beam co-sputtered CoxAg1−x granular films

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Abstract

A number of structural analysis methods were employed to investigate the microstructures of ion-beam co-sputtering of Co x Ag1−x (0⩽x⩽100 at%) granular films. Forx=22 at%, the sample which has the optimal giant magnetoresistance at room temperature, there exists either crystallized or highly disordered regions shown by high-resolution electron microscopy. At the boundary between cobalt granules and the silver matrix, lattice mismatch was formed, leading to roughness of the interfaces. X-ray diffraction and transmission electron microscopy revealed that the samples had f c c structure at lowx, with (111) texture, and the h c p structure gradually appeared as x>75 at %. Relative lattice expansion was observed asx increased.

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Authors and Affiliations

  1. National Laboratory of Solid State Microstructures and Institute for Solid State Physics, Nanjing University, 210093, Nanjing, People's Republic of China

    H. Sang, N. Xu, S. Y. Zhang, J. H. Du, Q. Li & Y. W. Du

  2. Center for Advanced Studies in Science and Technology of Microstructures, 210093, Nanjing, People's Republic of China

    H. Sang, N. Xu, S. Y. Zhang, J. H. Du, Q. Li & Y. W. Du

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  1. H. Sang
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  2. N. Xu
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  3. S. Y. Zhang
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  4. J. H. Du
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  5. Q. Li
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  6. Y. W. Du
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Sang, H., Xu, N., Zhang, S.Y. et al. Dependence of giant magnetoresistance on microstructures in ion-beam co-sputtered CoxAg1−x granular films. J Mater Sci 31, 5385–5389 (1996). https://doi.org/10.1007/BF01159307

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  • DOI: https://doi.org/10.1007/BF01159307

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