Size dependent exchange bias in single-phase Zn0.3Ni0.7Fe2O4 ferrite nanoparticles

被引：44

作者：

Mohan, Rajendra ^{[1
]}

Ghosh, Mritunjoy Prasad ^{[1
]}

Mukherjee, Samrat ^{[1
]}

机构：

[1] Natl Inst Technol, Dept Phys, Patna 800005, Bihar, India

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2018年 / 458卷

关键词：

Ferrites; Nanoparticles; Exchange bias; Interfacial spins; Magnetization; MAGNETIC-PROPERTIES; ANISOTROPY; NI;

D O I：

10.1016/j.jmmm.2018.03.030

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report the microstructural and magnetic characterization of single phase nanocrystalline partially inverted Zn0.3Ni0.7Fe2O4 mixed spinel ferrite. The samples were annealed at 200 degrees C, 400 degrees C, 600 degrees C, 800 degrees C and 1000 degrees C. X-ray diffraction results indicate phase purity of all the samples and application of Debye-Scherrer yielded a crystallite size variation from 5 nm to 33 nm for the different samples. Magnetic measurements have revealed the freezing of interfacial spins which were the cause of the large horizontal M-H loop shift causing large exchange bias with high anisotropy. The magnetic measurements show a hysteresis loop with high effective anisotropy constant due to highly magnetically disordered surface spin at 5 K. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：193 / 199

页数：7

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