Abstract

Magnetic behavior of thermomagnetically written domains in MnBi films (400 Å to 1200 Å thick) has been studied. The written domains were circular in shape but became deformed and irregular with increasing film thickness. The circular domains of 1.5 μm in diameter were stable only in the films thinner than 700 Å for writing and erasing processes. The stability of written domains can be explained by introducing measured wall coercivity values into a domain theory. The film wall coercivity was varied from 250 Oe to 800 Oe in inverse proportion to the film thickness.

© 1974 Optical Society of America

Subnanosecond Laser Recording on MnBi Thin Films

H. Haskal, E. Bernal G., and D. Chen
Appl. Opt. 13(4) 866-868 (1974)

MnBi Films as Potential Storage Media in Holographic Optical Memories

T. C. Lee
Appl. Opt. 11(2) 384-389 (1972)

Magnetic Materials for Optical Recording

D. Chen
Appl. Opt. 13(4) 767-778 (1974)

Optical Data Storage Potential of Six Materials

B. R. Brown
Appl. Opt. 13(4) 761-766 (1974)

Measuring the Refractive Index and Thickness of Thin Transparent Films: Method

V. Daneu and A. Sanchez
Appl. Opt. 13(1) 122-128 (1974)