Title :
Magnetic properties of NiFe films exchange-coupled with NiO
Author :
Lin, Chien-Li ; Sivertsen, John M. ; Judy, Jack H.
Author_Institution :
Center for Micromagnetics & Inf. Technol., Minnesota Univ., Minneapolis, MN, USA
fDate :
11/1/1995 12:00:00 AM
Abstract :
The unidirectional anisotropies of NiFe Permalloy thin films exchange-coupled to nickel oxide films are analyzed. Studies were made on ferromagnetic-antiferromagnetic of NiFe/NiO bilayer structures as a function of layers thicknesses. For a 100 Å thick Ni81Fe19 film deposited on top of a 400 Å thick NiO film, an exchange anisotropy field (He) of 115 Oe is obtained at room temperature after field-cooled from 200°C. The equivalent interfacial exchange coupling energy is 0.09 ergs/cm2
Keywords :
Permalloy; antiferromagnetic materials; exchange interactions (electron); ferromagnetic materials; magnetic anisotropy; nickel compounds; 100 A; 20 to 200 C; 400 A; NiFe-NiO; Permalloy thin films; ferromagnetic-antiferromagnetic bilayer structure; interfacial exchange coupling; layer thickness; unidirectional anisotropy; Anisotropic magnetoresistance; Antiferromagnetic materials; Helium; Magnetic field measurement; Magnetic films; Magnetic hysteresis; Magnetic materials; Magnetic properties; Optical films; Substrates;
Journal_Title :
Magnetics, IEEE Transactions on
