Magnetic Hysteresis and Complex Initial Permeability of Cr<sup>3+</sup>Substituted Mn-Zn Ferrites

• 作者: A. K. M. Akther Hossain F. Alam M. H. R. Khan M. L. Rahman
• 来源期刊: 现代物理(英文)
• 学科: 化学
• 关键词: MN-ZN Ferrites Initial PERMEABILITY SATURATION MAGNETIZATION HYSTERESIS Loss
• 年，卷（期）: 2014,（14）
• 页码范围: 1223-1233
• 页数: 11页
• 分类号: O6

摘要

The impact of Cr3+ ion on the magnetic properties of Mn0.50Zn0.50CrxFe2-xO4 (with x = 0.0, 0.1, 0.2, 0.3, 0.4 and 0.5) has been studied. Ferrite samples were synthesized by combustion method and sintered at various temperatures (1250°C, 1300°C and 1350°C). The structural properties were investigated by means of X-ray diffraction patterns and indicated that the samples possess single phase cubic spinel structure. The lattice parameter decreases with the increase in Cr3+ content, as the ionic radius of Cr3+ ion is smaller than that of Fe3+. The average grain size (D), bulk density (ρB) and initial permeability (μi’ )decreases with increase in Cr3+ content whereas porosity follows its opposite trend. The ρB was found to increase with increase in Cr3+ content as the sintering temperature (Ts) is increased from 1250°C to 1350°C. The Ts affects the densification, grain growth and (μi’ ) of the samples. The (μi’ ) strongly depends on average grain size, density and intragranular porosity. The B-H loops of the compositions were measured at room temperature. The saturation magnetization (Ms), coercivity (Hc) and hysteresis losses were studied as a function of Cr3+ content. The Ms was found to decrease with the increase of Cr3+ content, which is attributed to the dilution of A-B interaction.