Exchange-coupled nanocomposites with novel microstructure and enhanced remanence by a new approach

作     者：Baoru Bian Li Jin Qiang Zheng Fang Wang Xiaohong Xu Juan Du Baoru Bian;Li Jin;Qiang Zheng;Fang Wang;Xiaohong Xu;Juan Du

作者机构：CAS Key Laboratory of Magnetic Materials and DevicesNingbo Institute of Material Technology and EngineeringChinese Academy of Sciences(CAS)Ningbo 315201China Laboratory for MicrostructuresInstitute of MaterialsShanghai UniversityShanghai 200444China School of Chemistry and Materials ScienceShanxi Normal UniversityLinfen 041004China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2021年第79卷第20期

页      面：118-122页

核心收录：

学科分类：0817[工学-化学工程与技术] 0806[工学-冶金工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 0802[工学-机械工程] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：This work was financially supported by the National Natural Science Foundation of China(NSFC)(Nos.51771220,51771219,51771095 and 51422106) the Zhejiang Provincial Natural Science Foundation of China(No.LD19E010001) 

主　　题：Magnetic materials Nanocomposites Core-shell microstructure Exchange-coupling interactions 

摘      要：Exchange-coupled nanocomposites with hard/soft magnetic phases are promising for the next generation of permanent *** methods have an advantage in controlling the nanoscale size of both *** nanocomposites obtained by the chemical method generally consist of a hard phase core and a soft phase ***,the soft-phase shell is easily oxidized leading to small enhancement of ***,a novel microstructure of Fe@FePt nanocomposites with Fe soft phase core and FePt hard phase shell has been synthesized by replacement reaction,in which the size of core and shell can be controlled below 10 nm by adjusting the ratio of Fe nanoparticles to PtCl *** exchange-coupling(single-phase-like demagnetization curves)between soft-hard phases was observed due to the precise size control of both phases,and substantial enhancements both in remanence(32%)and saturation magnetization(81%)were obtained in optimal *** work provides an alternative routine to prepare heterostructure materials with various applications.