Magnetic characterization of Co1-xNixFe2O4 (0 <= x <= 1) nanoparticles prepared by co-precipitation route
文献类型：期刊论文
| 作者 | Maaz, K.1,2; Khalid, W.1; Mumtaz, A.1; Hasanain, S. K.1; Liu, J.3 ; Duan, J. L.3
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| 刊名 | PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
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| 出版日期 | 2009-02-01 |
| 卷号 | 41期号:4页码:593-599 |
| 关键词 | Magnetic properties Ferrite nanoparticles Surface anisotropy |
| ISSN号 | 1386-9477 |
| DOI | 10.1016/j.physe.2008.10.009 |
| 英文摘要 | Magnetic nanoparticles of Ni-doped cobalt ferrite [Co1-xNixFe2O4(0 <= x <= 1)] synthesized by coprecipitation route have been studied as a function of doping concentration (x) and particle size. The size of the particles as determined by X-ray diffractometer (XRD) and transmission electron microscope (TEM) analyses was found in the range 12-48 nm. The coercivity (H-C) and saturation magnetization (M-S) showed a decreasing behavior with increasing Ni concentration. M-S of all the samples annealed at 600 degrees C lies in the range 65.8-13.7 emu/gm. Field-cooled (FC) studies of the samples showed horizontal shift (exchange bias) and vertical shift in the magnetization loop. Strong decrease in exchange bias (H-b) and vertical shift (delta M) was found for low Ni concentrations while negligible decrease was found at higher concentrations. The presence of exchange bias in the low Ni-concentration region has been explained with reference to the interface spins interaction between a surface region (with structural and spin disorder) and a ferrimagnetic core region. M(T) graphs of the samples showed a decreasing trend of blocking temperature (T-b) with increasing Ni concentration. The decrease of T-b with increasing Ni concentration has been attributed to the lower anisotropy energy of Ni+2 ions as compared to Co+2 that increases the probability of the jump across the anisotropy barrier which in turn decreases the blocking temperature of the system. (C) 2008 Elsevier B.V. All rights reserved. |
| WOS关键词 | EXCHANGE BIAS ; COFE2O4 NANOPARTICLES ; NIFE2O4 ; FERRITE ; ANISOTROPY ; POWDERS ; SIZE |
| 资助项目 | Material Science Group-II, Institute of Modern Physics ; Chinese Academy of Sciences, Lanzhou, PR China |
| WOS研究方向 | Science & Technology - Other Topics ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000264471700015 |
| 出版者 | ELSEVIER SCIENCE BV |
| 资助机构 | Material Science Group-II, Institute of Modern Physics ; Chinese Academy of Sciences, Lanzhou, PR China |
| 公开日期 | 2010-10-29 |
| 源URL | [http://ir.imp.cas.cn/handle/113462/5375]  |
| 专题 | 近代物理研究所_近代物理研究所知识存储（2010之前） |
| 通讯作者 | Maaz, K. |
| 作者单位 | 1.Quaid I Azam Univ, Dept Phys, Islamabad, Pakistan 2.PINSTECH, IAD, Islamabad, Pakistan 3.Chinese Acad Sci, Inst Modern Phys, Lanzhou, Peoples R China |
| 推荐引用方式 GB/T 7714 | Maaz, K.,Khalid, W.,Mumtaz, A.,et al. Magnetic characterization of Co1-xNixFe2O4 (0 <= x <= 1) nanoparticles prepared by co-precipitation route[J]. PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES,2009,41(4):593-599. |
| APA | Maaz, K.,Khalid, W.,Mumtaz, A.,Hasanain, S. K.,Liu, J.,&Duan, J. L..(2009).Magnetic characterization of Co1-xNixFe2O4 (0 <= x <= 1) nanoparticles prepared by co-precipitation route.PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES,41(4),593-599. |
| MLA | Maaz, K.,et al."Magnetic characterization of Co1-xNixFe2O4 (0 <= x <= 1) nanoparticles prepared by co-precipitation route".PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES 41.4(2009):593-599. |
入库方式： OAI收割
来源：近代物理研究所
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