Abstract
The first and second magnetic anisotropy constants and and the spin wave (SW) stiffness constant of epitaxial Co films of in thickness have been determined by Brillouin light scattering (BLS) at room temperature in magnetic fields of up to 5.0 kOe. We employed three scattering geometries: (A) magnetic fields applied along the in-plane easy direction, (B) magnetic fields applied along the in-plane hard direction, and (C) a constant magnetic field rotated from the in-plane easy direction to the in-plane hard direction. We always examined SW’s propagating perpendicular to the magnetic field. Numerical analyses of the SW frequencies by a continuum dipole-exchange model with the magnetic anisotropy allowed us to obtain values of and These values are in good agreement with the BLS values reported for the epitaxial Co films by M. Grimsditch et al. [Phys. Rev. B 56, 2617 (1997)]. We also measured temperature development of film magnetization using a superconducting quantum inerference device magnetometer in a temperature range between 4.2 and 100 K. The temperature development of magnetization obeys the law and can be well reproduced by SW theory with BLS values of the magnetic constants.
- Received 9 April 2002
DOI:https://doi.org/10.1103/PhysRevB.67.134435
©2003 American Physical Society