Dielectric and magnetic response of SrFe12O19-CoFe2O4 composites obtained by solid state reaction

被引：55

作者：

Hilczer, Andrzej ^{[1
]}

Kowalska, Katarzyna ^{[2
]}

Markiewicz, Ewa ^{[1
]}

Pietraszko, Adam ^{[2
]}

Andrzejewski, Bartlomiej ^{[1
]}

机构：

[1] Polish Acad Sci, Inst Mol Phys, M Smoluchowskiego 17, PL-60179 Poznan, Poland

[2] Polish Acad Sci, Inst Low Temp & Struct Res, Okolna 2, PL-50422 Wroclaw, Poland

来源：

MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS | 2016年 / 207卷

关键词：

Hexaferrite-spinel nanocomposite; Exchange spring behavior; Magnetic properties; Dielectric response; EXCHANGE-COUPLING INTERACTION; FIELD-COOLED MAGNETIZATION; NANOCOMPOSITE MAGNETS; MICROWAVE-ABSORPTION; IRON(III) OXIDE; BEHAVIOR; TEMPERATURE; COERCIVITY; FERRITES; BIAS;

D O I：

10.1016/j.mseb.2016.02.003

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nanocomposites of hard magnetic SrFe12O19 hexaferrite and soft magnetic CoFe2O4 spinel with exchange spring interaction were obtained by simple solid state reaction during 8 h and 14 hat 1050 degrees C. The structure and morphology of the composites was characterized by X-ray diffraction, infrared spectroscopy and scanning electron microscopy. Dielectric and electric response of the composites were found to be similar to the behavior of other ferrites and can be well described within the Koops model of the ceramic consisting of highly conducting grains separated by poorly conducting grain boundaries. Single-phase magnetic hysteresis loops obtained for SrFe12O19/CoFe2O4 composites with weight ratio 4:1 containing similar to 1 wt.% hematite. The difference in magnetization below the temperature of irreversibility, measured in field cooling and zero field cooling experiments in fields exceeding doubled coercivity, was found to be greater for composites synthesized during 4-14 h than that obtained for 22 h. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：47 / 55

页数：9

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