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Unidirectional anisotropy in exchange coupled NiFe/FeMn system for thin NiFe films

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3 Author(s)
Y. K. Kim ; Quantum Peripherals Colorado Inc., Louisville, CO, USA ; K. Ha ; L. L. Rea

The unidirectional exchange anisotropy field Hex was investigated in NiFe/FeMn films. It was found that the Hex is proportional to tNiFe-1.2 for 30 Å⩽tNiFe⩽400 Å where tNiFe is the NiFe film thickness. For tNiFe=30 Å, Hex was measured to be 800 Oe in some samples. NiFe/FeMn structures on alumina underlayers were also studied; their presence reduces the strength of the anisotropy significantly

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IEEE Transactions on Magnetics  (Volume:31 ,  Issue: 6 )