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Relaxor Behaviors in xBaTiO₃–(1-x)CoFe₂O₄ Materials
Cao Thi My Dung,Nhu Hoa Tran Thi,Kieu Hanh Thi Ta,Vinh Cao Tran,Bao Thu Le Nguyen,Van Hieu Le,Phuong Anh Do,Anh Tuan Dang,Heongkyu Ju,Bach Thang Phan 한국자기학회 2015 Journal of Magnetics Vol.20 No.4
Dielectric properties of xBaTiO₃–(1-x)CoFe₂O₄ composite materials have been investigated. Dielectric properties of BaTiO₃, CoFe₂O₄ and 0.5BaTiO₃–0.5CoFe₂O₄ samples show frequency dependence, which is classified as relaxor behavior with different relaxing degree. The relaxor behaviors were described using the modified Curier-Weiss and Vogel–Fulcher laws. Among three above samples, the BaTiO₃ sample has highest relaxing degree. Photoluminescence spectral indicated defects, which might in turn control relaxing degree.