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Structural, Electrical and Magnetic Properties of BiFe1-xYxO3 (0 ≤ x ≤ 0.6) Ceramics
A.A.A. Najm, A.H. Shaari, H. Baqiah, E. Bin Saion, L.K. Pah, C.S. Kien, M.M.A. Kechik
Department of Physics, Faculty of Science, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia
received March 28, 2016, received in revised form May 22, 2016, accepted June 1, 2016
Vol. 7, No. 4, Pages 329-334 DOI: 10.4416/JCST2016-00028
Abstract
The effect of Y substitution on the microstructure, dielectric, magnetic and leakage current properties of BiFe1-xYxO3 (0 ≤ x ≤ 0.6) ceramics was investigated. The BiFeO3 phase that is dominant at x = 0.0 – 0.2 decreased with the increase of Y substitution. Other phases such as YFeO3 and Bi1.46Y0.54O3 emerged with Y substitution and became dominant in the range x = 0.3 – 0.4 and 0.5 – 0.6, respectively. The BiFe1-xYxO3 composites of rounded shape grains at x = 0.0 deformed at x = 0.1 – 0.3 and changed to melted-like grains at x = 0.4 – 0.6 with the incorporation of smaller grains at x = 0.5 and 0.6. The sample with x = 0.2 had the highest remnant magnetization (Mr = 0.09 emu/g) and saturation magnetization (Ms = 2.9 emu/g). The sample with x = 0.4 showed the highest dielectric constant of 104 and lowest loss tangent of 1.34 × 10-4. The leakage current was significantly reduced to a lower value of 2.80 × 10-8 A/cm2 at x = 0.6.
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Keywords
Bismuth ferrite ceramic, x-ray diffraction, solid-state reaction, magnetic properties, dielectric properties
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