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Giant Magnetoresistance of Fe/Ag Multilayer Films with Ultrathin Fe Layers |
| LI Shuxiang;YU Chengtao;YAN Minglang;LAI Wuyan;WANG Yizhong |
| State Key Laboratory for Magnetism, Institute of Physics, Academia Sinica, Beijing 100080 |
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| Cite this article: |
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LI Shuxiang, YU Chengtao, YAN Minglang et al 1994 Chin. Phys. Lett. 11 775-777 |
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Abstract A giant magnetoresistive effect in as-deposited Fe/Ag multilayer films with ultrathin Fe layers has been observed. The magnetoresistance in this system is presented first as a function of Fe layer thickness tFe. The sample with Fe layer thickness of 4Å exhibits a magnetoresistance ratio as large as 14.3% at 4.2K. The magnetoresistance ratio decreases approximately an order of magnitude with increasing tFe from 4 to 10Å and then changes slightly with further increasing tFe. From the hysteresis loop measurement, it is found that the interlayer coupling changes from antiferromagnetic to ferromagnetic with increasing tFe. The feature of material at the interface might be responsible for all these findings.
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| Keywords:
75.70.Cn
72.15.Gd
75.50.Rr
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Published: 01 December 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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75.50.Rr
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