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

Volume

36

Issue

5

fYear

2000

fDate

9/1/2000 12:00:00 AM

Firstpage

2632

Lastpage

2634

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 (H_ex) decreases during iterative MR measurements and this decrease associates closely with the changes in the rotational hysteresis loss (W_r), exchange anisotropy energy (K_e) and blocking temperature (T_b) 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;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.908540

Filename

908540