Affiliation:
1. College of Nuclear Science and Technology, University of South China, Hengyang, Hunan 421001, P. R. China
Abstract
In this work, BiFeO3 and BiCo[Formula: see text]Fe[Formula: see text]O3 nanoparticles prepared by the solution method were further investigated the magnetic properties. At room temperature, BiFeO3 reveals the antiferromagnetic order. However, Co doping achieves ferromagnetic enhancement. The room-temperature ferromagnetism and the causes are ulteriorly studied with the help of ABK plots. The stronger coercivity is due to the oxygen vacancies and stronger magnetic anisotropy caused by Co substitution. Under variable temperatures, the bifurcate curves of zero-field-cooled and field-cooled indicate the existence of spin-glass state for both samples. The weak ferromagnetism at low temperature and the spin-state transition of cobalt ions at 270[Formula: see text]K are also found.
Funder
National Natural Science Foundation of China
Natural Science Foundation of Hunan Province, China
Research Foundation of Education Bureau of Hunan Province, China
National Undergraduate Innovation and Entrepreneurship Training Program Support Projects of China
Publisher
World Scientific Pub Co Pte Ltd
Subject
Condensed Matter Physics,General Materials Science