Magnetic damping and wall mobility in films of the (Eu,Y)3(Ga,Fe)5O12system

Author

Borghese, Camillo ; De Gasperis, Paolo

Author_Institution

Instituto di Electronica dello Stato, Solido del Consiglio Nazionale delle Ricerche, Rome, Italy

Volume

16

Issue

5

fYear

1980

fDate

9/1/1980 12:00:00 AM

Firstpage

1038

Lastpage

1040

Abstract

Several important properties of a family of epitaxial garnet films having formula EuzY3-zGatFe5-tO12grown by the LPE technique on [111] GGG substrates have been examined in this paper. It has been possible to scan compositions having $0 \\leq t \\leq 1.82$ and $0.17 \\leq z \\leq 1.07$ by carefully respecting the film-substrate lattice match condition $z=0.492 t+0.172$ . By measuring and inferring from previous data the gyromagnetic ratio γeff, the saturation magnetization $4\\pi M_{s}$ , the uniaxial anisotropy field Hu, the Gilbert damping constant α and the exchange stiffness constant $A$ , it is seen that while the separation between the magnetization (tM) and the angular momentum (ts) compensation points is very small, the domain wall mobility is low in the entire range. This suggests that the behavior of α and Huis dominant over that of γeff.

Keywords

Magnetic bubble domains; Magnetic bubble films; Damping; Garnet films; Iron; Lattices; Magnetic anisotropy; Magnetic films; Magnetic separation; Perpendicular magnetic anisotropy; Saturation magnetization; Substrates;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.1980.1060853

Filename

1060853