Magnetic properties of magnesium-cobalt ferrites synthesized by co-precipitation method

被引：17

作者：

Joshi, HH ^{[1
]}

Pandya, PB ^{[1
]}

Modi, KB ^{[1
]}

Jani, NN ^{[1
]}

Baldha, GJ ^{[1
]}

Kulkarni, RG ^{[1
]}

机构：

[1] SAURASHTRA UNIV,DEPT PHYS,RAJKOT 360005,GUJARAT,INDIA

来源：

BULLETIN OF MATERIALS SCIENCE | 1997年 / 20卷 / 01期

关键词：

ferrites; co-precipitation; collinear spins; superparamagnetic clusters;

D O I：

10.1007/BF02753216

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The alternating current (ac) low field susceptibility vs temperature, magnetization and Fe-57 Mossbauer effect measurements are reported for the spinel solid solution series MgxCo1-xFe2O4 synthesized by a wet-chemical method before and after high temperature annealing. The observed features for the wet samples, such as the coexistence of paramagnetic doublet and magnetic sextets in Mossbauer spectra and lower saturation magnetization values confirm small particle ferrite behaviour. Especially, Mossbauer spectra of wet samples reveal the presence of superparamagnetic particles which exist simultaneously with ferrimagnetic regions in the materials well supported by a.c. susceptibility data. The high temperature annealing changes the wet-prepared ferrites into the ordered magnetic structure of ceramic ferrites.

引用

页码：93 / 101

页数：9

共 12 条

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[2]

BORRIESCI N, 1978, MAGN MAGN MAT, V7, P52

[3]

De Grave E., 1979, J PHYS C SOLID STATE, V40, P669

[4] SUPERPARAMAGNETISM IN MAGNETICALLY DILUTE SYSTEMS [J].