Title :
NiFe underlayer effects on exchange coupling field and coercivity in NiFe/FeMn films
Author :
Choe, G. ; Gupta, S.
Author_Institution :
Mater. Res. Corp., Orangeburg, NY, USA
fDate :
9/1/1997 12:00:00 AM
Abstract :
The effect of NiFe texture on the exchange coupling field and coercivity of Ta/NiFe/FeMn films was studied by varying the deposition conditions of dc magnetron-sputtered NiFe films. By decreasing argon pressure or by increasing substrate bias, strongly textured, large grains of NiFe(111) were grown, yielding highly oriented FeMn(111) texture. Well oriented NiFe(111)/FeMn(111) films yielded the highest exchange anisotropy (0.14 erg/cm2), lowest coercivity (≈2 Oe), and highest blocking temperature (200°C) ever reported
Keywords :
coercive force; exchange interactions (electron); ferromagnetic materials; grain size; interface magnetism; iron alloys; magnetic anisotropy; magnetic multilayers; manganese alloys; nickel alloys; sputtered coatings; tantalum; texture; 200 C; NiFe underlayer effects; NiFe/FeMn films; Ta-NiFe-FeMn; Ta/NiFe/FeMn films; coercivity; exchange coupling field; highest blocking temperature; highest exchange anisotropy; highly oriented FeMn(111) texture; large grains; magnetron-sputtered NiFe films; texture; Anisotropic magnetoresistance; Argon; Coercive force; Crystallography; Helium; Magnetic anisotropy; Magnetic materials; Perpendicular magnetic anisotropy; Spin valves; Temperature;
Journal_Title :
Magnetics, IEEE Transactions on
