Magnetic Properties of a Rare-Earth Antiferromagnetic Nanoparticle Investigated with a Quantum Simulation Model
作者机构：Faculty of Mathematics and PhysicsNanjing University of Information Science and TechnologyNanjing 210044 Department of Condensed Matter PhysicsFaculty of Mathematics and PhysicsCharles UniversityKe Karlovu 512116 Prague 2Czech Republic
出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)
年 卷 期：2011年第28卷第6期
页 面：251-254页
核心收录：
学科分类：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]
基 金：by the Natural Science Foundation of Jiangsu Province under Grant No BK2008438 the Ministry of Education of the Czech Republic under Grant No MSM 0021620834
摘 要：A Usov-type quantum model based on a mean-field approximation is utilized to simulate the magnetic structure of an assumed rare-earth nanoparticle consisting of an antiferromagnetic core and a paramagnetic outer *** study the magnetic properties in the presence and absence of an external magnetic *** simulation results show that the magnetic moments in the core region orientate antiferromagnetically in zero external magnetic field;an applied magnetic field rotates all of the magnetic moments in the paramagnetic shell completely to the field direction,and turns those in the core(which tries to maintain its original antiferromagnetic structure)towards the orientation in some degree;and the paramagnetic shell does not have a strong influence on the magnetic configuration of the core.
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