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
Published in:
Magnetics, IEEE Transactions on
(Volume:31
,
Issue:
6
)
Date of Publication: Nov 1995