Title
Yttrium iron garnet heterocoagulated by silicaYttrium iron garnet heterocoagulated by silica
Author
Publication type
article
Publication
New york :Ieee-inst electrical electronics engineers inc,
Subject
Physics
Source (journal)
IEEE transactions on magnetics. - New York, N.Y.
Source (book)
International Magnetics Conference (Intermag Europe 2002), APR 28-MAY 02, 2002, AMSTERDAM, NETHERLANDS
Volume/pages
38(2002):5Part 1, p. 2625-2627
ISSN
0018-9464
ISI
000178867200242
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Abstract
Coated purpose of homogeneous distribution as a second phase is introduced in magnetic systems. Yttrium iron garnet (YIG) shows special interest as magnetic dye, microwave absorber, and magnetic fluids when heterocoagulated by other material. Surface and interface magnetic properties are intimately connected with the new properties of the silica on YIG system. Neel first introduced the concept of surface anisotropy, and Chen et al. developed a model that describes the anisotropy effects at the boundary surface particle, which was applied in this work. Spherical YIG particles were prepared by coprecipitation method and coated with silica using the tetraethylorthosilicate (TEOS) hydrolysis process. The silica- YIG boundary was investigated by transmission electron microscopy. Hysteresis loops comparatively show the profile of the naked and silica-covered YIG particles. The surface anisotropics were calculated using the Chen et al. approach. Indeed, in heterocoagulation systems, the surface anisotropy is a result of the interface symmetry breaking, as observed.
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