Exchange coupled SrFe12O19/Fe-Co core/shell particles with different shell thickness

• Published in: Electronic materials letters Vol. 11; no. 6; pp. 1021 - 1027
• Main Authors: Xu, Xia, Hong, Yang-Ki, Park, Jihoon, Lee, Woncheol, Lane, Alan M.
• Format: Journal Article
• Language: English
• Published: Seoul The Korean Institute of Metals and Materials 01.11.2015; 대한금속·재료학회
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Condensed Matter Physics; Materials Science; Nanotechnology; Nanotechnology and Microengineering; Optical and Electronic Materials; 전자/정보통신공학; exchange coupling; iron cobalt; core/shell; hexagonal strontium ferrite
• ISSN: 1738-8090; 2093-6788
• DOI: 10.1007/s13391-015-5163-1

SrFe 12 O 19 /Fe-Co core/shell particles with different shell thickness were synthesized by polyol reduction of Fe and Co ions at 180°C with SrFe 12 O 19 particles dispersed in solvent. The core/shell structure is formed by magnetic self-assembly due to the remanent magnetization of SrFe 12 O 19 particles. Within a limited concentration range, the shell thickness could be controlled by regulating the concentration of Fe and Co ions. Core/shell structured SrFe 12 O 19 /Fe-Co particles showed more effective exchange coupling effects between hard and soft phases than physically mixed SrFe 12 O 19 and Fe-Co particles.