Investigation of Magnetic Interactions in Core/Shell Structured SrFe12O19/NiZnFe2O4 Nanocomposite

被引：17
作者：
Radmanesh, M. A. [1 ]
Ebrahimi, S. A. Seyyed [1 ]
Yourdkhani, A. [1 ]
Khanmohammadi, H. [1 ]
机构：
[1] Univ Tehran, Ctr Excellence Magnet Mat, Sch Met & Mat, Tehran, Iran
来源：
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM | 2012年 / 25卷 / 08期
关键词：
Surface modification; Core-shell; Exchange spring; Bi-magnetic; Nanocomposites; CORE-SHELL STRUCTURE; PERMANENT-MAGNETS; SILICA MATRIX; NANOPARTICLES;
D O I：
10.1007/s10948-011-1258-6
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
SrFe12O19 magnetic nanoparticles (MNPs) were synthesized by a sol-gel self-propagating method and subsequent heat treatment. The SrFe12O19/NiZnFe2O4 core/shell MNPs were obtained by coating the SrFe12O19 MNPs by glyoxilate precursor method using metallic nitrates and ethylene glycol. The core/shell was characterized by X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM) and vibrating sample magnetometry (VSM) techniques. Comparison of the observations with theoretical criteria indicated that the demagnetization behavior of composite NPs is in exchange spring mode. This phenomenon is attributed to the overcritical size, 46 nm, of the hard phase, which leads to partial exchange coupling between hard- and soft-magnetic phases.
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收藏
页码：2757 / 2762
页数：6
相关论文
共 26 条
[1]   Magnetic nanostructures as amplifiers of transverse fields in magnetic resonance [J].
Barbic, M ;
Scherer, A .
SOLID STATE NUCLEAR MAGNETIC RESONANCE, 2005, 28 (2-4) :91-105
[2]  
Birdi K.S., 2003, HDB SURFACE COLLOID, P387
[3]   Ferromagnetic planar nanocomposites [J].
Carbucicchio, M ;
Rateo, M .
HYPERFINE INTERACTIONS, 2004, 156 (01) :581-593
[4]   Thermal instabilities in exchange biased materials [J].
Fernandez-Outon, L. E. ;
Vallejo-Fernandez, G. ;
Manzoor, Sadia ;
O'Grady, K. .
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2006, 303 (02) :296-301
[5]   Preparation and photocatalytic characteristics of core-shell structure TiO2/BaFe12O19 nanoparticles [J].
Fu, Wuyou ;
Yang, Haibin ;
Li, Minghua ;
Chang, Lianxia ;
Yu, Qingjiang ;
Xu, Jing ;
Zou, Guangtian .
MATERIALS LETTERS, 2006, 60 (21-22) :2723-2727
[6]   Preparation and characteristics of core-shell structure nickel/silica nanoparticles [J].
Fu, WY ;
Yang, HB ;
Chang, LX ;
Li, MH ;
Bala, H ;
Yu, QJ ;
Zou, GT .
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2005, 262 (1-3) :71-75
[7]   Exchange coupled magnetic nanocomposites of Sm(Co1-xFex)5/Fe3O4 with core/shell structure [J].
Hong, Jung Hoon ;
Kim, Wan Seop ;
Lee, Jong In ;
Hur, Nam Hwi .
SOLID STATE COMMUNICATIONS, 2007, 141 (10) :541-544
[8]   Preparation, characterization and application of Fe3O4/ZnO core/shell magnetic nanoparticles [J].
Hong, R. Y. ;
Zhang, S. Z. ;
Di, G. Q. ;
Li, H. Z. ;
Zheng, Y. ;
Ding, J. ;
Wei, D. G. .
MATERIALS RESEARCH BULLETIN, 2008, 43 (8-9) :2457-2468
[9]   On the Fe3O4/Mn1-xZnxFe2O4 core/shell magnetic nanoparticles [J].
Hong, R. Y. ;
Li, J. H. ;
Cao, X. ;
Zhang, S. Z. ;
Di, G. Q. ;
Li, H. Z. ;
Wei, D. G. .
JOURNAL OF ALLOYS AND COMPOUNDS, 2009, 480 (02) :947-953
[10]   Sonochemical synthesis of ferromagnetic core-shell Fe3O4-FeP nanoparticles and FeP nanoshells [J].
Hu, C. G. ;
Li, Y. ;
Liu, J. P. ;
Zhang, Y. Y. ;
Bao, G. ;
Buchine, B. ;
Wang, Z. L. .
CHEMICAL PHYSICS LETTERS, 2006, 428 (4-6) :343-347
123