Structural analysis of nickel doped cobalt ferrite nanoparticles prepared by coprecipitation route

被引：134

作者：

Maaz, K. ^{[1
]}

Karim, S. ^{[1
]}

Mashiatullah, A. ^{[1
]}

Liu, J. ^{[2
]}

Hou, M. D. ^{[2
]}

Sun, Y. M. ^{[2
]}

Duan, J. L. ^{[2
]}

Yao, H. J. ^{[2
]}

Mo, D. ^{[2
]}

Chen, Y. F. ^{[2
,3
]}

机构：

[1] PINSTECH, Islamabad, Pakistan

[2] Chinese Acad Sci, Inst Modern Phys, Lanzhou, Peoples R China

[3] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

来源：

PHYSICA B-CONDENSED MATTER | 2009年 / 404卷 / 21期

关键词：

High coercivity magnetic materials; Ferrite nanoparticles; Surface anisotropy; MAGNETIC-PROPERTIES;

D O I：

10.1016/j.physb.2009.07.134

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Magnetic nanoparticles of nickel substituted cobalt ferrite (NixCo1-xFe2O4:0 <= x <= 1) have been synthesized by co-precipitation route. Particles size as estimated by the full width half maximum (FWHM) of the strongest X-ray diffraction (XRD) peak and transmission electron microscopy (TEM) techniques was found in the range 18-28 +/- 4 nm. Energy dispersive X-ray (EDX) analysis confirms the presence of Co, Ni, Fe and oxygen as well as the desired phases in the prepared nanoparticles. The selective area electron diffraction (SAED) analysis confirms the crystalline nature of the prepared nanoparticles. Data collected from the magnetization hysteresis loops of the samples show that the prepared nanoparticles are highly magnetic at room temperature. Both coercivity and saturation magnetization of the samples were found to decrease linearly with increasing Ni-concentration in cobalt ferrite. Superparamagnetic blocking temperature as determined from the zero field cooled (ZFC) magnetization curve shows a decreasing trend with increasing Ni-concentration in cobalt ferrite nanoparticles. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：3947 / 3951

页数：5

共 22 条

[1]

Aharoni A., 1996, Introduction to the Theory of Ferromagnetism

[2] Colloquium:: Opportunities in nanomagnetism [J].