| Original Articles |
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Giant Magnetoresistance Effect in Melt Spun CoCu granular Alloys |
| LI Min1,2;ZHAO Xuegen1;ZHAO Tongyun1;ZHAO Jiangao1;SHEN Baogen1;CHAI Weiping1;GU Yousong1;MAI Zhenhong1;MEI Liangmo2
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| 1Institute of Physics, Academia Sinica, Bejjing 100080
2Department of Physics, Shandong University, Jinan 250100
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| Cite this article: |
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LI Min, ZHAO Xuegen, ZHAO Tongyun et al 1994 Chin. Phys. Lett. 11 510-513 |
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Abstract granular magnetic CoxCu1-x(x= 0.05 - 0.5) alloy ribbons were prepared by melt spinning method, and the structural, magnetotransport, magnetic properties and the effects of annealing on these properties were studied by x-ray diffraction, vibrating sample magnetometer, magnetoresistance measurement at room temperature. Giant magnetoresistance was observed over a broad range of Co concentrations with a maximum magnetoresistance (MR) ratio of 7.8% (at x = 0.20 and 500°C annealing) under a magnetic field of 20kOe. The MR ratio increases with the annealing temperature and reaches a maximum at about 500°C and then drops. The dependence of MR and magnetization on magnetic field for various granule parameters were studied by controlling the nucleation and growth of Co granules.
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| Keywords:
75.70.Cn
72.15.Gd
75.60.Jp
81.35.+k
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Published: 01 August 1994
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| PACS: |
75.70.Cn
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(Magnetic properties of interfaces (multilayers, superlattices, heterostructures))
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72.15.Gd
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(Galvanomagnetic and other magnetotransport effects)
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75.60.Jp
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81.35.+k
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