Intergranular magnetoresistance of strontium ferromolybdate ceramics caused by spin-polarized tunneling

Open Ceramics

Gunnar Suchaneck¹  Evgenii Artiukh² 

[1] Corresponding author.;SSPA “Scientific-Practical Materials Research Centre of NAS of Belarus”, Cryogenic Research Division, 220072, Minsk, Belarus;

关键词: Strontium ferromolybdate;    Magnetoresistance;    Spin-polarized tunneling;   

DOI  :  

来源: DOAJ

【 摘 要 】

In this work, we develop a model for the description of the low-field magnetoresistance of Sr2FeMoO6−δ ceramics that, for the very first time, is considering the magnetic field dependence of the tunneling barrier height. The core of the model is the temperature and magnetic field dependence of the reduced magnetization m. Spin polarization is considered as a function of temperature and antisite disordering. A magnetic field dependence of the intergrain barrier height was supposed. The model satisfactorily describes the low field magnetoresistance for magnetic fields exceeding several times the coercive field.

【 授权许可】

Unknown