Physical, electrical and magnetic properties of nano-sized Co-Cr substituted magnesium ferrites
Physical, electrical and magnetic properties of nano-sized Co-Cr substituted magnesium ferrites
复制标题
纳米Co-Cr取代镁铁氧体的物理、电学和磁学性能
DOI：
10.1063/1.3676438
复制
发表时间：
2012
影响因子：
3.2
通讯作者：
Y. Melikhov
中科院分区：
文献类型：
--
作者：
M. Iqbal;Z. Ahmad;T. Meydan;Y. Melikhov
采用聚乙二醇辅助微乳液法制备了Co-Cr取代的镁铁氧体纳米材料（Mg1−xCoxCrxFe2−xO4，其中x = 0.0−0.5）。 X 射线衍射分析证实了合成材料的单相立方密排晶格形成。测量磁滞回线高达 4 MA/m 的磁场，并使用趋近饱和定律对这些回线的高磁场区域进行建模，以计算磁晶各向异性常数。样品的饱和磁化强度最初从 x = 0.0 时的 148 kA/m 增加到 299 kA/m (x = 0.3)，然后降低到 187 kA/m (x = 0.5)。该系列的居里温度范围为 618-766 K。室温电阻率从 7.5 × 108 Ω cm (x = 0.0) 逐渐增加到 3.47 × 109 Ω cm (x = 0.5)。此外，介电测量是在室温下、100 Hz 至 3 MHz 的频率范围内进行的。随着上述性能值的提高，合成的材料可能适合在一些磁性和微波器件中的潜在应用。
Co-Cr substituted magnesium ferrite nanomaterials (Mg1−xCoxCrxFe2−xO4 with x = 0.0−0.5) have been prepared by the polyethylene glycol assisted micro emulsion method. X-ray diffraction analysis confirms the single-phase cubic close-packed lattice formation of synthesized materials. Hysteresis loops are measured up to field of 4 MA/m and high field region of these loops are modeled using the Law of Approach to saturation to calculate the magnetocrystalline anisotropy constant. The saturation magnetization of the samples increases initially from 148 kA/m for x = 0.0 to 299 kA/m (x = 0.3) and then decreases to 187 kA/m (x = 0.5). Curie temperature for this series is found to be in the range of 618-766 K. Room temperature resistivity increases gradually from 7.5 × 108 Ω cm (x = 0.0) to 3.47 × 109 Ω cm (x = 0.5). Additionally, dielectric measurements are carried out at room temperature in a frequency range of 100 Hz to 3 MHz. With improvement in the values of the above-mentioned properties, the synthesized materials could be suitable for potential application in some magnetic and microwave devices.