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@ARTICLE{Singha:641749,
      author       = {Singha, A. D. and Seehra, M. S. and Skoulatos, M. and
                      Sarkar, T. and Pramanik, P. and Chowdhury, Sourav and
                      Hoesch, M. and Reehuis, M. and Többens, D. M. and Raghu, A.
                      and Kaushik, S. D. and Thota, Subhash},
      title        = {{A}nisotropy driven spin–reorientation, and two–step
                      magnetic ordering in cubic semiconducting spinel
                      {C}r$_{0.1}${M}n$_{0.9}${F}e$_{0.2}${C}o$_{1.8}${O}$_4$},
      journal      = {Journal of physics / Condensed matter},
      volume       = {37},
      number       = {22},
      issn         = {0953-8984},
      address      = {Bristol},
      publisher    = {IOP Publ.},
      reportid     = {PUBDB-2025-05160},
      pages        = {225802},
      year         = {2025},
      note         = {Waiting for fulltext},
      abstract     = {The nature of magnetism in the cubic spinel
                      Cr$_{0.1}\%$Mn$_{0.9}$Fe$_{0.2}$Co$_{1.8}$O$_4$ is reported
                      based onsystematic investigations by means of magnetization
                      (M), ac susceptibility (χ) and heat capacity (C$_P$)
                      measurements, as well as by neutron diffraction. Structural
                      characterization of the samplewas done using x-ray
                      absorption spectroscopy, neutron and synchrotron
                      diffraction. The M vs. Tvariation in different magnetic
                      fields indicate ferrimagnetic ordering below T$_C$ = 230
                      K,followed by a magnetic field and anisotropy induced spin
                      reorientation at TSR ∼150 K. Withincreasing T starting
                      from 2 K, the coercivity HC and anisotropy field HK decrease
                      and becomenegligible for T > T$_{SR}$. A model to explain
                      the HC vs. T data shows that TSR is due toreorientation of M
                      along H when H > H$_K$. The C$_P$ vs. T data shows a weak λ
                      -type anomaly atTC with changes in magnetic entropy smaller
                      than those observed below TSR suggesting thatlong-range
                      magnetic ordering is completed below T$_{SR}$. For T$_{SR}$
                      < T < T$_C$, the presence ofweakly interacting magnetic
                      clusters having weak short-range interactions is evident
                      based onanalysis of magnetization and ac susceptibilities.
                      Exchange constants (J$_{AA}$/k$_B$ = 7.9 K, J$_{AB}$/k$_B$
                      =22.6 K and J$_{BB}$/k$_B$ = –5.3 K) are determined from
                      the temperature dependence of paramagneticsusceptibility for
                      T > T$_C$. This analysis also shows the low-spin S = 0 state
                      of Co$^{3+}$ ions on the B sites which along with negligible
                      H$_K$ for T$_{SR}$ < T < T$_C$ produces weakly interacting
                      magneticclusters in this magnetic semiconductor with bandgap
                      ∼0.57 eV.},
      cin          = {DOOR ; HAS-User / FS-PETRA-S},
      ddc          = {530},
      cid          = {I:(DE-H253)HAS-User-20120731 /
                      I:(DE-H253)FS-PETRA-S-20210408},
      pnm          = {631 - Matter – Dynamics, Mechanisms and Control
                      (POF4-631) / 6G3 - PETRA III (DESY) (POF4-6G3)},
      pid          = {G:(DE-HGF)POF4-631 / G:(DE-HGF)POF4-6G3},
      experiment   = {EXP:(DE-H253)P-P04-20150101},
      typ          = {PUB:(DE-HGF)16},
      doi          = {10.1088/1361-648X/add63d},
      url          = {https://bib-pubdb1.desy.de/record/641749},
}