The remanence ratio in CoFe2O4 nanoparticles with approximate single-domain sizes

doi:10.1186/s11671-016-1691-3

IMR OpenIR

	The remanence ratio in CoFe2O4 nanoparticles with approximate single-domain sizes
	Xu,Shitao 1,2; Ma,Yongqing 1; Geng,Bingqian 1; Sun,Xiao 1; Wang,Min 1
通讯作者	Ma,Yongqing(yqma@ahu.edu.cn)
	2016-10-22
发表期刊	Nanoscale Research Letters
ISSN	1931-7573
卷号	11 期号:1
摘要	AbstractApproximately single-domain-sized 9-, 13-, and 16-nm CoFe2O4 nanoparticles are synthesized using the thermal decomposition of a metal-organic salt. By means of dilution and reduction, the concentration, moment, and anisotropy of nanoparticles are changed and their influence on the magnetic properties is investigated. The relation of Mr/Ms?∝?1/lgHdip is observed, where Mr/Ms is the remanence ratio and Hdip is the maximum dipolar field. Especially, such relation is more accurate for the nanoparticle systems with higher concentration and higher moment, i.e., larger Hdip. The deviation from Mr/Ms?∝?1/lgHdip appearing at low temperatures can be attributed to the effects of surface spins for the single-phase CoFe2O4 nanoparticles and to the pinning effect of CoFe2O4 on CoFe2 for the slightly reduced nanoparticles.Graphical AbstractApproximately single-domain-sized 9-, 13-, and 16-nm CoFe2O4 nanoparticles were synthesized and then the concentration, moment, and anisotropy of these NPs were changed. The correlation of Mr/Ms?∝?1/lgHdip was observed, independent of the size, concentration, moment, and anisotropy, and especially, such correlation is more accurate for the nanoparticle systems with higher concentration or moment, i.e., stronger dipolar interaction, which has not been reported before as far as we know.
关键词	CoFe2O4 nanoparticles Remanence ratio Dipolar interaction Surface spins
DOI	10.1186/s11671-016-1691-3
语种	英语
WOS记录号	BMC:10.1186/s11671-016-1691-3
出版者	Springer US
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/80464
专题	中国科学院金属研究所
通讯作者	Ma,Yongqing
作者单位	1.Anhui University; Anhui Key Laboratory of Information Materials and Devices, School of Physics and Materials Science 2.Huaibei Normal University; School of Physics and Electronic Information
推荐引用方式 GB/T 7714	Xu,Shitao,Ma,Yongqing,Geng,Bingqian,et al. The remanence ratio in CoFe2O4 nanoparticles with approximate single-domain sizes[J]. Nanoscale Research Letters,2016,11(1).
APA	Xu,Shitao,Ma,Yongqing,Geng,Bingqian,Sun,Xiao,&Wang,Min.(2016).The remanence ratio in CoFe2O4 nanoparticles with approximate single-domain sizes.Nanoscale Research Letters,11(1).
MLA	Xu,Shitao,et al."The remanence ratio in CoFe2O4 nanoparticles with approximate single-domain sizes".Nanoscale Research Letters 11.1(2016).