Synthesis and characterization of high coercivity rare-earth ion doped Sr0.9RE0.1Fe10Al2O19 (RE: Y, La, Ce, Pr, Nd, Sm, and Gd)

被引：123

作者：

Rai, B. K. ^{[1
]}

Mishra, S. R. ^{[1
]}

Nguyen, V. V. ^{[2
]}

Liu, J. P. ^{[2
]}

机构：

[1] Univ Memphis, Dept Phys, Memphis, TN 38152 USA

[2] Univ Texas Arlington, Dept Phys, Arlington, TX 76019 USA

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2013年 / 550卷

基金：

美国国家科学基金会;

关键词：

Sr-Ferrite; Autocombustion; Doped ferrite; MAGNETIC-PROPERTIES; DIELECTRIC-PROPERTIES; BARIUM FERRITE; PARTICLE-SIZE; HEXAFERRITE; SUBSTITUTION; ANISOTROPY;

D O I：

10.1016/j.jallcom.2012.09.021

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Influence of replacing Sr2+ ions by rare-earth ions (RE3+) ions on the structural and magnetic properties of high coercivity (H-c) SrFe10Al2O19 hexaferrite have been investigated using X-ray diffraction, transmission electron microscopy, differential scanning calorimeter, and SQUID. A 73% increase in intrinsic coercivity is observed for Al3+ doped SrFe10Al2O19 as compared to that of pure SrFe12O19. The RE3+ doping brings in further 50% increase in the coercivity to Sr0.9RE0.1Fe10Al2O19. Overall the Curie temperature of Sr0.9RE0.1Fe10Al2O19 reduced upon RE3+ substitution, however, among rare-earth ions Pr3+ doping showed highest T-c similar to 620 K. Doping SrFe10Al2O19 with RE3+ ions seems to be detrimental to the saturation magnetization but was observed to be favorable to the coercivity enhancement. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：198 / 203

页数：6

共 45 条

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