Title :
Unidirectional anisotropy in exchange coupled NiFe/FeMn system for thin NiFe films
Author :
Kim, Y.K. ; Ha, K. ; Rea, L.L.
Author_Institution :
Quantum Peripherals Colorado Inc., Louisville, CO, USA
fDate :
11/1/1995 12:00:00 AM
Abstract :
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
Keywords :
Permalloy; alumina; exchange interactions (electron); ferromagnetic materials; iron alloys; magnetic anisotropy; manganese alloys; 30 to 400 angstrom; Al2O3; NiFe-FeMn; Permalloy; alumina underlayers; exchange coupled NiFe/FeMn system; film thickness; thin NiFe films; unidirectional anisotropy; Anisotropic magnetoresistance; Couplings; Giant magnetoresistance; Magnetic anisotropy; Magnetic field measurement; Magnetic films; Magnetic heads; Magnetic sensors; Perpendicular magnetic anisotropy; Substrates;
Journal_Title :
Magnetics, IEEE Transactions on
