期刊
CERAMICS INTERNATIONAL
卷 44, 期 13, 页码 15995-16004出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2018.06.033
关键词
Sr hexaferrites; Cr substitution; Magnetic properties; Optical properties; Hyperfine interactions; BET analysis
资金
- Deanship of Scientific Research (DSR) of Imam Abdulrahman Bin Faisal University [2017-605-IRMC, 2018-209-IRMC]
- Institute for Research and Medical Consultations (IRMC) of Imam Abdulrahman Bin Faisal University [2017-605-IRMC, 2018-209-IRMC]
Chromium-substituted strontium nano-hexaferrites, SrCrxFe12-xO19 (0.0 <= x <= 1.0), were produced by the hydrothermal route. The structure, morphology, optical and magnetic properties were studied. Crystal structure, spinel phase and functional groups were verified using X-ray diffraction and Fourier Transform Infrared spectroscopy. The average crystallites size is ranging between 50 and 67 nm. Scanning electron microscopy observations indicated that the multi-grains of the particles are aggleromated and are hexagonal in shape. The isotherm plots obtained from the nitrogen physisorption experiments showed that the mesopore area and the total pore volume decreased progressively with increasing the Cr3+ content. Besides, the band gap energy (E-g) decreases from 1.75 to 1.43 eV. The magnetic hysteresis loops showed that the produced nano-hexaferrites exhibit hard ferromagnetic-like (FM) behavior. Compared to the pristine SrFe12O19 product, the deduced saturation (M-s) and remanent (M-r) magnetizations, the coercivity (H-c) and the magnetocrystalline anisotropy field (H-a) increase for lower Cr3+ content (x <= 0.4) and then decrease as the Cr3+ content further increases. The squareness ratio M-r/M-s are ranging between 0.5 and 0.6, suggesting the single domain nano-sized particles with uniaxial anisotropy for various synthesized products. Mossbauer analysis was done to determine the quadrupole splitting, the isomer shift, and the hyperfine magnetic field values of all products.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据