Influence of Mn substitution on crystal structure and magnetocrystalline anisotropy of nanocrystalline Co1-xMnxFe2-2xMn2xO4

被引：40

作者：

Kumar, Lawrence ^{[1
,2
]}

Kumar, Pawan ^{[1
]}

Kar, Manoranjan ^{[1
]}

机构：

[1] Indian Inst Technol Patna, Dept Phys, Patna 800013, Bihar, India

[2] Cent Univ Jharkhand, Ctr Nanotechnol, Ranchi 835205, Bihar, India

来源：

APPLIED NANOSCIENCE | 2013年 / 3卷 / 01期

关键词：

Rietveld; Spinel; Magnetocrystalline; Law of approach; XRD; MAGNETIC-ANISOTROPY;

D O I：

10.1007/s13204-012-0071-2

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Nanocrystalline Mn substituted cobalt ferrite Co1-xMnxFe2-2xMn2xO4 (x = 0.0-0.4) has been synthesized by the standard citrate-gel method. The structural and magnetic characteristics of all samples have been studied using powder X-ray diffraction, Fourier transform infrared spectroscopy (FT-IR), field emission scanning electron microscope (FE-SEM) and VSM techniques. Distributions of cations between the two interstitial sites (tetrahedral and octahedral site) have been estimated qualitatively by analyzing the powder X-ray diffraction patterns by employing the Rietveld refinement technique. All samples are found to be mixed spinel with cubic structure (Fd (3) over barm space group). The FT-IR study shows the presence of absorption bands in the range of 390-750 cm(-1), which confirm the spinel structure of the sample. The stoichiometry of Co, Fe, Mn and O ions in the sample has been obtained by using energy-dispersive spectrum with help of an FE-SEM. The magnetizations in saturation have been analyzed by employing the "law of approach" technique. The saturation magnetization, coercivity and magnetocrystalline anisotropy constant depend upon Mn ion concentration and crystallite size.

引用

页码：75 / 82

页数：8