Structural, Mössbauer spectroscopy and magnetic study of Co1-xCdxFe2O4 ferrite synthesized by glycol-thermal method

被引:0
|
作者
Masuku, S. J. C. [1 ]
Msomi, J. Z. [1 ]
Nhlapo, T. A. [2 ]
Moyo, T. [3 ]
机构
[1] Walter Sisulu Univ, Dept Chem & Phys Sci, P Bag X01, ZA-5117 Mthatha, South Africa
[2] Sefako Makgatho Hlth Sci Univ, Dept Med Phys, POB 146, ZA-0204 Medunsa, South Africa
[3] Univ KwaZulu Natal, Sch Chem & Phys, P Bag X54001, ZA-4000 Durban, South Africa
基金
新加坡国家研究基金会;
关键词
Nanoparticles; Spinel ferrites; Superparamagnetism; Mossbauer spectroscopy; CATION DISTRIBUTION; ZN; CO; NANOPARTICLES; SUBSTITUTION; SIZE; MOSSBAUER; CD2+;
D O I
10.1016/j.inoche.2023.111874
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
The Cd2+ substituted Co1-xFe2O4 with concentrations of (0 <= x <= 0.7) nano ferrites were synthesized using the glycol-thermal method. X-ray diffraction (XRD) and Fourier-transformed infrared (FT-IR) spectroscopy confirmed the structural formation and nanocrystalline structure of spinel ferrites. Samples possess a cubic spinel lattice structure with crystallite sizes varying between 5.1 nm and 15.5 nm. Transmission electron microscopy (TEM) revealed fine particles which are nearly spherical in shape. The Fe-57 M & ouml;ssbauer spectral studies showed an ordered magnetic spin state for x <= 0.5 which transforms to a paramagnetic phase for x >= 0.6 due to the weakening of super-exchange interactions. The saturation magnetization (M-S) was the highest at x = 0 with a value of 73.3 emu/g and fluctuated between 44.3 emu/g and 19.8 emu/g after the addition of non-magnetic Cd2+ ions. The field dependence of dM/dH curves reveals the finite size effect which leads to the frustration in magnetic moments.
引用
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页数:13
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