The effect of urea-to-nitrates ratio on the morphology and magnetic properties of Mn0.8Mg0.2Fe2O4

被引：24

作者：

Ahmed, M. A. ^{[1
]}

机构：

[1] Cairo Univ, Fac Sci, Dept Phys, Mat Sci Lab 1, Giza, Egypt

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2010年 / 322卷 / 07期

关键词：

Mn-Mg nanometric ferrite; Flash auto-combustion; Magnetization; Coercivity; FERRITE; TEMPERATURE; POWDERS; ZN;

D O I：

10.1016/j.jmmm.2009.10.019

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Mn0.8Mg0.2Fe2O4 ferrite was synthesized using flash auto-combustion techniqueusing urea as fuel. The effect of the urea-to-nitrates ratio was examined and found to affect the samples characteristics. The as-burnt powder was crystallized in single-phase spinel structure of cubic symmetry. The lattice parameter was decreased with increase in the urea-to-nitrates ratio (n) while the crystal size increased from 21 to 42 nm with n changing from 6.67 to 10. The coercivity increases while the saturation and remanence magnetization decreases with increase in n. This was attributed to the disturbance of the spin order as a result of the surface effects. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：763 / 766

页数：4

共 28 条

[1] Preparation and characterization of nanometric Mn ferrite via different methods [J].

Ahmed, M. A. ;

Okasha, N. ;

El-Dek, S. I. .

NANOTECHNOLOGY, 2008, 19 (06)

[2]

AHMED SR, 2001, RES SOC S P, V661

[3]

[Anonymous], 1972, Introduction to Magnetic Materials

[4]

BUSCHOW KHJ, 1995, PROGR SPINEL FERRITE, V8, P198

[5] Reducing gas-sensing properties of ferrite compounds MFe2O4 (M = Cu, Zn, Cd and Mg) [J].

Chen, NS ;

Yang, XJ ;

Liu, ES ;

Huang, JL .

SENSORS AND ACTUATORS B-CHEMICAL, 2000, 66 (1-3) :178-180

[6]

CHEN YJ, 1995, J MATER SCI LETT, V14, P998, DOI 10.1007/BF00274630

[7]

Clegg A. G., 2003, MAGNETIC MAT ELECT E

[8] Magnetization reversal in co-precipitated cobalt ferrite [J].

Cornejo, DR ;

Medina-Boudri, A ;

Bertorello, HR ;

Matutes-Aquino, J .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2002, 242 :194-196

[9] Effect of heating conditions during combustion synthesis on the characteristics of Ni0.5Zn0.5Fe2O4 nanopowders [J].

Costa, ACFM ;

Tortella, E ;

Morelli, MR ;

Kaufman, M ;

Kiminami, RHGA .

JOURNAL OF MATERIALS SCIENCE, 2002, 37 (17) :3569-3572

[10] Finite size effects on the structural and magnetic properties of sol-gel synthesized NiFe2O4 powders [J].

George, M ;

John, AM ;

Nair, SS ;

Joy, PA ;

Anantharaman, MR .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2006, 302 (01) :190-195

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