A discussion on the magnetization calculation in polycrystalline antiferromagnetic system: Application to EuTiO3

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:324

Article

Alho, B. P.¹  Carvalho, A. Magnus G.²  von Ranke, P. J.¹ 

[1] Univ Estado Rio de Janeiro, Inst Fis Armando Dias Tavares, BR-20550013 Rio De Janeiro, Brazil

[2] Inst Nacl Metrol Normalizacao & Qualidade Ind INM, Div Mat Metrol, BR-25250020 Duque De Caxias, RJ, Brazil

关键词: Magnetocaloric effect;    Antiferromagnetic;    EuTiO3;   

DOI  :  10.1016/j.jmmm.2011.08.014

来源: Elsevier

【 摘 要 】

In this work a numerical methodology is theoretically proposed to calculate the magnetization of a polycrystalline system, considering a microscopic Hamiltonian model, which describes a magnetic system consisting of two sublattices of different magnetic ions coupled by exchange interactions and with parallel and perpendicular direction of the magnetic field. The influence of changing the applied magnetic field direction on an antiferromagnetic system was systematically analyzed. The proposed numerical method was applied to the cubic perovskite EuTiO3 and a good agreement with the experimental data was obtained. (c) 2011 Elsevier B.V. All rights reserved.

【 授权许可】

Free