Title :
Exchange coupling and stability of PtMn-based spin valves
Author :
Diao, Z.T. ; Ueno, M. ; Kojo, A. ; Nishida, H. ; Hikami, F. ; Fukagawa, T. ; Sawasaki, T. ; Tabuchi, K. ; Kamei, K.
Author_Institution :
Read-Rite SMI Corp., Osaka, Japan
fDate :
9/1/2000 12:00:00 AM
Abstract :
The exchange coupling and stability of spin valves with antiferromagnetic (AF) PtMn films were investigated through the correlation between the magnetic properties and their microstructures. The exchange coupling field (Hex) decreases during iterative MR measurements and this decrease associates closely with the changes in the rotational hysteresis loss (Wr), exchange anisotropy energy (Ke) and blocking temperature (Tb) distribution. The ordering of PtMn films, featuring an antiphase configuration, is found to play a significant role in determining the exchange coupling properties and stability of these spin valves
Keywords :
antiferromagnetic materials; exchange interactions (electron); magnetic anisotropy; magnetic hysteresis; magnetic thin films; magnetoresistance; manganese alloys; platinum alloys; spin valves; PtMn; PtMn-based spin valves; antiferromagnetic films; antiphase configuration; blocking temperature distribution; exchange anisotropy energy; exchange coupling; exchange coupling field; iterative magnetoresistance measurements; magnetic properties; microstructure; rotational hysteresis loss; stability; Antiferromagnetic materials; Couplings; Energy measurement; Loss measurement; Magnetic field measurement; Magnetic films; Magnetic properties; Microstructure; Spin valves; Stability;
Journal_Title :
Magnetics, IEEE Transactions on
