• Magnetoresistance stories of double perovskites

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      https://www.ias.ac.in/article/fulltext/pram/084/06/0967-0975

    • Keywords

       

      Tunnelling magnetoresistance; tunnel boundary; disorder; double perovskite.

    • Abstract

       

      Tunnelling magnetoresistance (TMR) in polycrystalline double perovskites has been an important research topic for more than a decade now, where the nature of the insulating tunnel barrier is the core issue of debate. Other than the nonmagnetic grain boundaries as conventional tunnel barriers, intragrain magnetic antiphase boundaries (APB) as well as magnetically frustrated grain surfaces have also been proposed to act as tunnel barriers in Sr2FeMoO6. In this review, the present state of the debate has been discussed briefly and how the physical state of the material can affect the magnetoresistance signal of double perovskites in many different ways has been pointed out.

    • Author Affiliations

       

      Abhishek Nag1 Sugata Ray1 2

      1. Department of Materials Science, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700 032, India
      2. Centre for Advanced Materials, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700 032, India
    • Dates

       
  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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