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      Permanent link:
      https://www.ias.ac.in/article/fulltext/jcsc/118/01/0087-0092

    • Keywords

       

      Double-perovskite structure; disordered Sr2FeMoO6; chemical/electronic inhomogeneity; phase separation; spectromicroscopy; spatially resolved photoemission spectroscopy

    • Abstract

       

      Disordered Sr2FeMoO6 shows a drastic reduction in saturation magnetization compared to highly ordered samples, moreover magnetization as a function of the temperature for different disordered samples shows qualitatively different behaviours. We investigate the origin of such diversity by performing spatially resolved photoemission spectroscopy on various disordered samples. Our results establish that extensive electronic inhomogeneity, arising most probably from an underlying chemical inhomogeneity in disordered samples, is responsible for the observed magnetic inhomogeneity. It is further pointed out that these inhomogeneities are connected with composition fluctuations of the type Sr2Fe1+xMo1-xO6 with Fe-rich (x > 0) and Mo-rich (x < 0) regions.

    • Author Affiliations

       

      Dinesh Topwal1 U Manju1 Sugata Ray1 2 S Raj1 3 D D Sarma1 S R Krishnakumar4 5 M Bertolo6 S La Rosa6 G Cautero6

      1. Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore - 560 012
      2. Materials and Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama - 226-8503, Japan
      3. Department of Physics, Tohoku University, Sendai - 9808578, Japan
      4. International Centre for Theoretical Physics (ICTP), Strada Costiera 11, Trieste - 34100, Italy
      5. Saha Institute of Nuclear Physics, Kolkata - 700 064
      6. Sincrotrone Trieste S.C.p.A., s.s. 14 km 163, 5 Area Science Park, Trieste - 34012, Italy
    • Dates

       
  • Journal of Chemical Sciences | News

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