Synthesis, structure and magnetic properties of Fe-Gd nanocapsules coated with B2O3/H3BO3 and Fe3BO5+GdBO3

doi:10.1016/j.physb.2004.08.012

IMR OpenIR

	Synthesis, structure and magnetic properties of Fe-Gd nanocapsules coated with B2O3/H3BO3 and Fe3BO5+GdBO3
	Si, PZ ; Bruck, E ; Zhang, ZD ; Tegus, O ; Buschow, KHJ ; Zhang, WS ; Klaasse, JCP ; de Boer, FR
通讯作者	Si, PZ(psi@science.uva.nl)
	2004-11-30
发表期刊	PHYSICA B-CONDENSED MATTER
ISSN	0921-4526
卷号	353 期号:1-2 页码:1-8
摘要	Nanocapsules consisting of B2O3/H3BO3 encapsulating Fe-Gd cores have been synthesized by an arc-discharge process using metal-boron alloys as cathode. Most of the nanocapsules have a well-constructed shell/core structure with a uniform B2O3/H3BO3 shell. Heat-treatment induces reactions between the shell and the core, resulting in the formation of a Fe3BO5+GdBO3 matrix embedded with Fe nanoparticles, reduction of the metallic-core size and decrease of the blocking temperature T-B. Above T-B, the magnetization curves plotted vs. H/T overlap and show zero coercivity. Below T-B, the coercivity shows a linear dependence when plotted vs. T-1/2. However, the coercivity-T-1/2 curve below 60 K has a different slope from that above 60 K, indicating the existence of two different magnetic phases in the nanocapsules. Different from bulk Fe3BO5, nanoscale Fe3BO5 particles have a lower transition temperature to the weak-ferromagnetic state. and magnetic hysteresis is absent due to size effects. (C) 2004 Elsevier B.V. All rights reserved.
关键词	nanocapsules transmission electron microscopy (TEM) X-ray photoelectron spectroscopy (XPS) magnetic properties
DOI	10.1016/j.physb.2004.08.012
收录类别	SCI
语种	英语
WOS研究方向	Physics
WOS类目	Physics, Condensed Matter
WOS记录号	WOS:000225502300001
出版者	ELSEVIER SCIENCE BV
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/81169
通讯作者	Si, PZ
作者单位	1.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Int Ctr Mat Phys, Shenyang 110016, Peoples R China 3.Univ Amsterdam, Van Der Waals Zeeman Inst, NL-1018 XE Amsterdam, Netherlands
推荐引用方式 GB/T 7714	Si, PZ,Bruck, E,Zhang, ZD,et al. Synthesis, structure and magnetic properties of Fe-Gd nanocapsules coated with B2O3/H3BO3 and Fe3BO5+GdBO3[J]. PHYSICA B-CONDENSED MATTER,2004,353(1-2):1-8.
APA	Si, PZ.,Bruck, E.,Zhang, ZD.,Tegus, O.,Buschow, KHJ.,...&de Boer, FR.(2004).Synthesis, structure and magnetic properties of Fe-Gd nanocapsules coated with B2O3/H3BO3 and Fe3BO5+GdBO3.PHYSICA B-CONDENSED MATTER,353(1-2),1-8.
MLA	Si, PZ,et al."Synthesis, structure and magnetic properties of Fe-Gd nanocapsules coated with B2O3/H3BO3 and Fe3BO5+GdBO3".PHYSICA B-CONDENSED MATTER 353.1-2(2004):1-8.