Title :
Exchange stiffness constant and effective gyromagnetic factor of Gd, Tb and Nd containing, amorphous rare earth-transition metal films
Author :
Mathieu, C. ; Hillebrands, B. ; Raasch, D.
Author_Institution :
2. Phys. Inst., Tech. Hochschule Aachen, Germany
fDate :
11/1/1994 12:00:00 AM
Abstract :
The exchange stiffness constant and the effective gyromagnetic factor of amorphous Gd13.5Tb6.2Fe80.3, Gd21.2Co78.8, Gd19.4Nd6.1Fe 74.5 and Gd19.6Nd10.3Fe70.1 alloy films have been determined by Brillouin light scattering and from measurements of the domain wall energy. All samples, which show a constant Curie temperature of 465 K, exhibit the same exchange stiffness constant, as measured by Brillouin light. The obtained values of both methods agree Gd13.5Tb6.2Fe80.3 and Gd 21.2Co78.8 films, but not for the Nd containing films. The latter is attributed to a breakdown of the standard Bloch domain wall equation in Nd containing systems
Keywords :
Brillouin spectra; amorphous magnetic materials; cobalt alloys; exchange interactions (electron); ferromagnetic materials; gadolinium alloys; gyromagnetic ratio; iron alloys; magnetic domain walls; magnetic domains; magnetic thin films; neodymium alloys; terbium alloys; 465 K; Brillouin light scattering; Gd13.5Tb6.2Fe80.3; Gd19.4Nd6.1Fe74.5; Gd19.6Nd10.3Fe70.1; Gd21.2Co78.8; alloy films; constant Curie temperature; domain wall energy; effective gyromagnetic factor; exchange stiffness constant; standard Bloch domain wall equation; Amorphous materials; Brillouin scattering; Cobalt alloys; Electric breakdown; Energy measurement; Gyromagnetism; Iron alloys; Light scattering; Neodymium; Temperature;
Journal_Title :
Magnetics, IEEE Transactions on
