Mossbauer and Magnetic Studies of Co0.5Mn0.5Fe2O4 and Mn0.1Mg0.2Co0.7 Fe2O4 Nanoferrites

被引：5
作者：
Abdallah, H. M. I. [1 ]
Msomi, J. Z. [2 ]
Moyo, T. [1 ]
Lancok, A. [3 ]
机构：
[1] Univ KwaZulu Natal, Sch Phys, ZA-4000 Durban, South Africa
[2] Univ Free State, Dept Phys, ZA-9866 Phuthaditjhaba, South Africa
[3] AS CR, Vvi, Inst Inorgan Chem, Husinec Rez 25068 1001, Czech Republic
来源：
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM | 2012年 / 25卷 / 08期
关键词：
Ferrites; Superparamagnetism; Mossbauer spectroscopy; Magnetization; SPINEL FERRITES; COBALT FERRITE; NANOPARTICLES; ZINC;
D O I：
10.1007/s10948-011-1230-5
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We report the magnetic properties of Mn0.5Co0.5Fe2O4 and Mn0.1Mg0.2Co0.7Fe2O4 nanoferrites. The compounds were synthesized by a glycol-thermal method with average particle sizes of about 13 nm and 8 nm, respectively. The Mossbauer measurements were done at 300 K. The distribution of cations between tetrahedral (A) and octahedral (B) sites is investigated. The Mossbauer spectra indicate ferrimagnetic behavior of the compound. Field cooled (FC) and zero field cooled (ZFC) magnetizations were performed by a Superconducting Quantum Interference Device (SQUID) magnetometer from 4-380 K. Variation of the magnetizations with the applied fields (up to 50 kOe) were recorded at isothermal temperatures 4, 50, 100, 200 and 300 K. An increase in FC magnetization is observed with increasing applied field. This is explained based on superparamagnetic behavior of the particles.
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页码：2619 / 2623
页数：5
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