中国物理B ›› 2016, Vol. 25 ›› Issue (8): 87502-087502.doi: 10.1088/1674-1056/25/8/087502

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Magnetocaloric and magnetic properties of La2NiMnO6 double perovskite

Masrour R, Jabar A   

  1. Laboratory of Materials, Processes, Environment and Quality, Cady Ayyed University, National School of Applied Sciences, P. O. Box 63 46000, Safi, Morocco
  • 收稿日期:2016-02-06 修回日期:2016-03-30 出版日期:2016-08-05 发布日期:2016-08-05
  • 通讯作者: Masrour R E-mail:rachidmasrour@hotmail.com

Magnetocaloric and magnetic properties of La2NiMnO6 double perovskite

Masrour R, Jabar A   

  1. Laboratory of Materials, Processes, Environment and Quality, Cady Ayyed University, National School of Applied Sciences, P. O. Box 63 46000, Safi, Morocco
  • Received:2016-02-06 Revised:2016-03-30 Online:2016-08-05 Published:2016-08-05
  • Contact: Masrour R E-mail:rachidmasrour@hotmail.com

摘要: The magnetic effect and the magnetocaloric effect in La2NiMnO6(LNMO) double perovskite are studied using the Monte Carlo simulations. The magnetizations, specific heat values, and magnetic entropies are obtained for different exchange interactions and external magnetic fields. The adiabatic temperature is obtained. The transition temperature is deduced. The relative cooling power is established with a fixed value of exchange interaction. According to the master curve behaviors for the temperature dependence of ΔSmmax predicted for different maximum fields, in this work it is confirmed that the paramagnetic-ferromagnetic phase transition observed for our sample is of a second order. The near room-temperature interaction and the superexchange interaction between Ni and Mn are shown to be due to the ferromagnetism of LNMO.

关键词: oxides magnetocaloric, Monte Carlo simulation specific heat, magnetic properties

Abstract: The magnetic effect and the magnetocaloric effect in La2NiMnO6(LNMO) double perovskite are studied using the Monte Carlo simulations. The magnetizations, specific heat values, and magnetic entropies are obtained for different exchange interactions and external magnetic fields. The adiabatic temperature is obtained. The transition temperature is deduced. The relative cooling power is established with a fixed value of exchange interaction. According to the master curve behaviors for the temperature dependence of ΔSmmax predicted for different maximum fields, in this work it is confirmed that the paramagnetic-ferromagnetic phase transition observed for our sample is of a second order. The near room-temperature interaction and the superexchange interaction between Ni and Mn are shown to be due to the ferromagnetism of LNMO.

Key words: oxides magnetocaloric, Monte Carlo simulation specific heat, magnetic properties

中图分类号:  (Magnetocaloric effect, magnetic cooling)

  • 75.30.Sg
05.10.Ln (Monte Carlo methods)