Response of iron oxide on hetero-nanostructures of soft and hard ferrites

被引：5
|
作者：
Khan, U. [1 ,3 ]
Adeela, N. [2 ]
Wan, C. H. [1 ]
Irfan, M. [1 ]
Naseem, S. [3 ]
Riaz, S. [3 ]
Iqbal, M. [2 ]
Han, X. F. [1 ]
机构：
[1] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China
[2] Univ Punjab, Ctr High Energy Phys, Lahore 54000, Pakistan
[3] Univ Punjab, Ctr Solid State Phys, Lahore 54000, Pakistan
来源：
SUPERLATTICES AND MICROSTRUCTURES | 2016年 / 92卷
基金：
中国国家自然科学基金;
关键词：
Core-shell hetero-nanostructures; Iron oxide; Ferrites; MAGNETIC-PROPERTIES; NANOPARTICLES;
D O I：
10.1016/j.spmi.2016.02.007
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Core-shell nanostructures of Zinc and Cobalt ferrites synthesized by solution evaporation route are observed to perform novel magnetic response. The structural and morphological analyses of ZnFe2O4-core/Fe3O4-shell and CoFe2O4-core/Fe3O4-shell nanoparticles (NPs) are confirmed with X-ray diffractometer (XRD) and high resolution transmission electron microscopy (HRTEM). Physical properties measurement system (PPMS) investigations at room temperature reveal that the synthesized core-shell NPs (similar to 8 nm in diameter) are in super-paramagnetic state. The coercivity of ZnFe2O4/Fe3O4 is much lower than that of CoFe2O4/Fe3O4 NPs (e.g., at 5 K: H-c = 0.6kOe for ZnFe2O4/Fe3O4 and H-c = 18kOe for CoFe2O4/Fe3O4. Fe3O4 is preferable to reduce magnetic hardness for Zinc ferrite and enhance for Cobalt Ferrite. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：374 / 379
页数：6
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