Published August 21, 2021 | Version Version of Record
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Intergranular magnetoresistance of strontium ferromolybdate ceramics caused by spin-polarized tunneling

  • 1. SSPA "Scientific-Practical Materials Research Centre of NAS of Belarus", Cryogenic Research Division, 220072, Minsk, Belarus
  • 2. TU Dresden, Solid State Electronics Laboratory, 01062, Dresden, Germany

Description

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.

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Funding

SPINMULTIFILM – Physical principles of the creation of novel SPINtronic materials on the base of MULTIlayered metal-oxide FILMs for magnetic sensors and MRAM 778308
European Commission