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@ARTICLE{Azavedo:638645,
      author       = {Azavedo, Myren and Dias, Elaine Teodolinda and Priolkar,
                      Kaustubh},
      title        = {{D}isorder driven magnetostructural coupling in
                      {M}n{C}o{G}e$_{1−x}${S}n$_x$},
      journal      = {Journal of applied physics},
      volume       = {138},
      number       = {4},
      issn         = {0021-8979},
      address      = {Melville, NY},
      publisher    = {American Inst. of Physics},
      reportid     = {PUBDB-2025-04126},
      pages        = {043903},
      year         = {2025},
      abstract     = {MnCoGe-based intermetallics have garnered significant
                      attention owing to their pronounced negative thermal
                      expansion and large magnetocaloric effect (MCE), both of
                      which are highly sensitive to chemical substitutions.
                      Despite extensive studies, the microscopic origin underlying
                      the tunability of these properties remains unclear. In this
                      study, we conducted a comprehensive investigation of the
                      local atomic environments around Mn and Co in MnCoGe Sn (⁠
                      ⁠) using extended x-ray absorption fine structure and
                      other structural and magnetic characterization techniques.
                      Our analysis reveals that the substitutional disorder
                      introduced by Sn atoms occupying the Ge sublattice sites
                      disrupts the cooperative lattice distortions required for
                      the long-range displacive martensitic transformation. This
                      disorder-induced suppression results in a systematic
                      decrease in both the martensitic transition temperature (⁠
                      ⁠) and the magnetic ordering temperature (⁠ ⁠). At low
                      doping levels, the convergence of and enhances
                      magnetostructural coupling, thereby amplifying the MCE.
                      However, further Sn substitution ultimately suppresses the
                      martensitic transition entirely, leading to a decoupling of
                      the magnetic and structural degrees of freedom and a
                      consequent degradation of the magnetostructural response.},
      cin          = {FS DOOR-User},
      ddc          = {530},
      cid          = {$I:(DE-H253)FS_DOOR-User-20241023$},
      pnm          = {6G3 - PETRA III (DESY) (POF4-6G3) / FS-Proposal: I-20210145
                      (I-20210145) / INDIA-DESY - INDIA-DESY Collaboration
                      $(2020_Join2-INDIA-DESY)$},
      pid          = {G:(DE-HGF)POF4-6G3 / G:(DE-H253)I-20210145 /
                      $G:(DE-HGF)2020_Join2-INDIA-DESY$},
      experiment   = {EXP:(DE-H253)P-P65-20150101},
      typ          = {PUB:(DE-HGF)16},
      doi          = {10.1063/5.0281364},
      url          = {https://bib-pubdb1.desy.de/record/638645},
}