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Journal of Nanomaterials
Volume 2012, Article ID 154192, 5 pages
http://dx.doi.org/10.1155/2012/154192
Research Article

Effects of Annealing Temperature on Structure and Magnetic Properties of T b 𝑥 Y 3 − 𝑥 F e 5 O 1 2 ( 𝑥 = 0 . 2 and 0.4) Thin Films

School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Malaysia

Received 14 January 2012; Revised 15 February 2012; Accepted 29 March 2012

Academic Editor: Weichang Hao

Copyright © 2012 N. B. Ibrahim et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Terbium-substituted yttrium iron garnet ( T b 𝑥 Y 3 − 𝑥 F e 5 O 1 2 ( 𝑥 = 0 . 2 and 0.4)) thin films have been successfully prepared by a sol-gel method followed by spin-coating process. The annealing of the films was performed at different temperatures like 700, 800, and 9 0 0 ∘ C and found that the films annealed at 9 0 0 ∘ C turned out to be crystallized into a pure garnet phase. All of the films were bearing grains of nanometer in size. Increasing the annealing temperature gave extra energy to the grains causing to be agglomerates. The lattice contraction occurred as the grain’s sizes were decreased due to the decrease of Fe2+ formation. The magnetic measurements show that all of the films are soft magnetic materials with low saturation magnetization values. The hysteresis loops of the films which were annealed at 9 0 0 ∘ C were found angular in shape similar to the single crystal-like YIG film.