Comparative study of structural and magnetic properties of Ni and La substituted calcium hexaferrite

Q3 Materials Science

Cerâmica Pub Date : 2021-09-01 DOI:10.1590/0366-69132021673833111

V. S. Shinde, S. G. Dahotre, K.E.S. Anandibai

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引用次数: 3

Abstract

Ni and La substituted M-type Ca hexaferrite of composition CaNi 1 Fe 11 O 19 and CaLa 1 Fe 11 O 19 were synthesized by sol-gel auto combustion method using metal nitrates as oxidants and citric acid as reducing agent. The prepared samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), energy dispersive X-ray analysis (EDAX), and vibrating sample magnetometry (VSM). XRD study revealed that both samples had lattice parameters a and c within the range of M-type hexaferrite. The SEM micrographs displayed grains having irregular shapes and sizes in the nanometer range. FTIR peaks confirmed the structure of M-type hexaferrite. EDAX spectra showed the homogeneous distribution of ions in both samples. In CaNi 1 Fe 11 O 19 , we found saturation magnetization (M s ) of 12.18 emu/g and coercivity (H c ) of 193.2 Oe. On the other hand, in CaLa 1 Fe 11 O 19 , we found M s of 0.55 emu/g and H c of 404.4 Oe. Saturation magnetization and coercivity values obtained for La substituted M-type Ca hexaferrite are suitable for low-density magnetic recording devices.

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镍与La取代六铁氧体钙的结构与磁性比较研究

以金属硝酸盐为氧化剂，柠檬酸为还原剂，采用溶胶-凝胶自燃烧法合成了Ni和La取代的m型六铁氧体ca1fe11o19和cala1fe11o19。采用x射线衍射(XRD)、扫描电镜(SEM)、傅里叶变换红外光谱(FTIR)、能量色散x射线分析(EDAX)和振动样品磁强计(VSM)对制备的样品进行了表征。XRD研究表明，两种样品的晶格参数a和c都在m型六铁体的范围内。SEM显微图显示纳米范围内颗粒形状和尺寸不规则。FTIR峰证实了m型六铁体的结构。EDAX光谱显示两种样品中离子分布均匀。CaNi 1fe11o19的饱和磁化强度(M s)为12.18 emu/g，矫顽力(H c)为193.2 Oe。另一方面，在cala1fe11o19中，我们发现M s为0.55 emu/g, H c为404.4 Oe。得到的La取代m型Ca六铁氧体的饱和磁化强度和矫顽力值适用于低密度磁记录器件。

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来源期刊

Cerâmica Materials Science-Ceramics and Composites

CiteScore

1.90

自引率

0.00%

发文量

审稿时长

10 weeks

期刊介绍： A Revista Cerâmica, órgão oficial da Associação Brasileira de Cerâmica (ABCERAM) publica contribuições originais de interesse na área de cerâmica, compreendendo arte cerâmica, abrasivos, biocerâmicas, cerâmicas avançadas, cerâmica branca, cerâmica de mesa, cerâmica eletroeletrônica, cerâmica estrutural, cerâmica magnética, cerâmica nuclear, cerâmica óptica, cerâmica química, cerâmica termomecânica, cerâmica vermelha, cimento, compósitos de matriz cerâmica, materiais refratários, materiais de revestimento, matérias-primas, vidrados, vidros e vitrocerâmicas, análise microestrutural, ciência básica, instrumentação, processos de fabricação, síntese de pós, técnicas de caracterização etc.