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Small-angle neutron scattering and magnetically heterogeneous state in Sr2FeMoO6–δ

Nikolay Kalanda; Vasil Garamus; Mikhail Zheludkevich; Marta Yarmolich; Maria Serdechnova; Dietmar Christian Florian Wieland; Alexander Petrov; Aliaksandr Zhaludkevich; Nikolai A. Sobolev


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    "language": "eng", 
    "title": "Small-angle neutron scattering and magnetically heterogeneous state in Sr2FeMoO6\u2013\u03b4", 
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        "title": "Physical principles of the creation of novel SPINtronic materials on the\nbase of MULTIlayered metal-oxide FILMs for magnetic sensors and MRAM", 
        "acronym": "SPINMULTIFILM", 
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    "keywords": [
      "strontium ferromolybdate", 
      "superstructure ordering", 
      "oxygen non-stoichiometry", 
      "magnetization", 
      "small-angle neutron scattering"
    ], 
    "publication_date": "2019-05-09", 
    "creators": [
      {
        "affiliation": "Scientific-Practical Materials Research Centre of the NAS of Belarus, P. Brovka str. 19, 220072 Minsk, Belarus", 
        "name": "Nikolay Kalanda"
      }, 
      {
        "affiliation": "Helmholtz\u2013Zentrum Geesthacht: Zentrum f\u00fcr Material- und K\u00fcstenforschung GmbH, Max\u2013Planck\u2013Str. 1, D\u201321502 Geesthacht, Germany", 
        "name": "Vasil Garamus"
      }, 
      {
        "affiliation": "Helmholtz\u2013Zentrum Geesthacht: Zentrum f\u00fcr Material- und K\u00fcstenforschung GmbH, Max\u2013Planck\u2013Str. 1, D\u201321502 Geesthacht, Germany", 
        "name": "Mikhail Zheludkevich"
      }, 
      {
        "affiliation": "Scientific-Practical Materials Research Centre of the NAS of Belarus, P. Brovka str. 19, 220072 Minsk, Belarus", 
        "name": "Marta Yarmolich"
      }, 
      {
        "affiliation": "Helmholtz\u2013Zentrum Geesthacht: Zentrum f\u00fcr Material- und K\u00fcstenforschung GmbH, Max\u2013Planck\u2013Str. 1, D\u201321502 Geesthacht, Germany", 
        "name": "Maria Serdechnova"
      }, 
      {
        "affiliation": "Helmholtz\u2013Zentrum Geesthacht: Zentrum f\u00fcr Material- und K\u00fcstenforschung GmbH, Max\u2013Planck\u2013Str. 1, D\u201321502 Geesthacht, Germany", 
        "name": "Dietmar Christian Florian Wieland"
      }, 
      {
        "affiliation": "Scientific-Practical Materials Research Centre of the NAS of Belarus, P. Brovka str. 19, 220072 Minsk, Belarus", 
        "name": "Alexander Petrov"
      }, 
      {
        "affiliation": "Scientific-Practical Materials Research Centre of the NAS of Belarus, P. Brovka str. 19, 220072 Minsk, Belarus", 
        "name": "Aliaksandr Zhaludkevich"
      }, 
      {
        "affiliation": "Departamento de F\u00edsica and I3N, Universidade de Aveiro, 3810\u2013193 Aveiro, Portugal & National University of Science and Technology MISiS, 119049 Moscow, Russia", 
        "name": "Nikolai A. Sobolev"
      }
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    "description": "<p>Single-phase strontium ferromolybdate (Sr2FeMoO6&ndash;&delta;) samples with different degrees of the superstructural ordering of the Fe/Mo cations were obtained from partially reduced SrFeO3&ndash;\u0445, SrMoO4 precursors by the solid-state technology. The study of the temperature dependences of the magnetization measured in the field-cooling and zero-field-cooling regimes indicated an inhomogeneous magnetic state of the samples. The presence of magnetic regions of different nature has also been revealed by the small-angle neutron scattering. For the Sr2FeMoO6&ndash;&delta; samples with different superstructural ordering of the Fe/Mo cations and for all values of the magnetic field induction in the range up to 1.5 T and of the scattering vector in the interval 0.1 &gt;q &gt;0.005 &Aring;&ndash;1, the analytical dependence I ~ q&ndash;&alpha; obeys the Porod law (&alpha; &asymp; 4), which corresponds to an object with a smooth and well-marked surface and polydisperse grain size. Deviations from the Porod law in the q &gt; 0.1 &Aring;&ndash;1 region and a weakening of the neutron scattering in applied magnetic fields may be ascribed to magnetic inhomogeneities with diameters D &lt;6 nm, which are partially destroyed /oriented by magnetic fields \u0412 &ge;1.5 T.&nbsp;</p>"
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