Room temperature ferromagnetic ordering in indium substituted nano-nickel-zinc ferrite
Room temperature ferromagnetic ordering in indium substituted nano-nickel-zinc ferrite
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DOI：
10.1063/1.3062956
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发表时间：
2009-03
影响因子：
3.2
通讯作者：
S. Thakur;S. C. Katyal;Ajay Gupta;V. Reddy;Mahavir Singh
中科院分区：
文献类型：
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作者：
S. Thakur;S. C. Katyal;Ajay Gupta;V. Reddy;Mahavir Singh
采用反胶束技术合成了不同铟含量（x= 0，0.1，0.2）的纳米镍锌铟铁氧体（NZIFO）（Ni0.58Zn0.42InxFe2− xO 4）。X射线衍射和透射电子显微镜证实了纳米铁氧体的尺寸，结构和形态。在镍锌铁氧体（NZFO）中添加铟已被证明在提高磁性能方面起着至关重要的作用。室温穆斯堡尔谱表明，纳米NZFO铁氧体表现出集体磁激发，而铟掺杂的NZFO样品具有铁磁相。研究了穆斯堡尔参数，即同质异能素位移、四极分裂、谱线宽度和超精细磁场对In ~（3+）浓度的依赖关系。穆斯堡尔谱研究表明，阳离子的分布不仅取决于颗粒的大小，而且还取决于制备路线。穆斯堡尔结果也支持磁化数据。在室温下清晰的六重奏和滞后现象...
Nano-nickel-zinc-indium ferrite (NZIFO)(Ni0.58Zn0.42InxFe2−xO4) with varied quantities of indium (x=0,0.1,0.2) have been synthesized via reverse micelle technique. X-ray diffraction and transmission electron microscopy confirmed the size, structure, and morphology of the nanoferrites. The addition of indium in nickel-zinc ferrite (NZFO) has been shown to play a crucial role in enhancing the magnetic properties. Room temperature Mossbauer spectra revealed that the nano-NZFO ferrite exhibit collective magnetic excitations, while indium doped NZFO samples have the ferromagnetic phase. The dependence of Mossbauer parameters, viz. isomer shift, quadrupole splitting, linewidth, and hyperfine magnetic field, on In3+ concentration has been studied. Mossbauer study on these nanosystems shows that the cation distribution not only depends on the particle size but also on the preparation route. Mossbauer results are also supported by magnetization data. Well defined sextets and appearance of hysteresis at room temper...