% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@ARTICLE{Galivarapu:828002,
      author       = {Galivarapu, Jagadish K. and Kumar, D. and Banerjee, A. and
                      Rath, Chandana},
      title        = {{M}agnetic {T}ransitions in {C}hemically {S}ynthesized
                      {N}anoparticles of {C}o{C}r$_{2}$ {O}$_{4}$},
      journal      = {IEEE transactions on magnetics},
      volume       = {52},
      number       = {8},
      issn         = {1941-0069},
      address      = {New York, NY},
      publisher    = {IEEE},
      reportid     = {FZJ-2017-02024},
      pages        = {1 - 6},
      year         = {2016},
      abstract     = {Bulk CoCr2O4 undergoes a transition from paramagnetic to
                      long-range ferrimagnetic phase at Ts (94 K) to a long-range
                      and/or short-range spiral order at Ts (~24 K), and finally
                      shows a lock-in-transition below 15 K. The spiral component
                      induces an electric polarization and also a spontaneous
                      magnetization for which it is said to be multiferroic.
                      Reducing the size of a CoCr2O4 multiferroic material to ~50
                      nm by a coprecipitation method, we obtain a pure cubic phase
                      with space group, Fd3m and lattice parameter (8.334 ±
                      0.003°A). A rich sequence of magnetic transitions are
                      examined by measuring temperature and field-dependent
                      magnetization and diffused neutron scattering (DNS) using
                      polarized neutron at different temperatures. While
                      paramagnetic to ferrimagnetic transition is enhanced from 97
                      K in bulk to 99 K at 0.5 kOe field, followed by a decrease
                      in lock-in-transition (TL) from 15 K in bulk to 8 K, spiral
                      ordering temperature does not show a significant change. A
                      strong disagreement between paramagnetic moment obtained
                      from the fitting of χ-1 = (T/C) + (1/χo) - (b/T - θ) and
                      ferrimagnetic moment obtained from the M versus H loop taken
                      at 2 K, nonsaturated magnetization at 50-100 kOe field, two
                      order of magnitude higher coercivity (Hc), and splitting of
                      ac susceptibly confirm the core-shell structure of the
                      particles. Furthermore, a magnetic scattering analysis
                      clearly shows that while the paramagnetic to ferrimagnetic
                      transition is continuous, the spiral ordering is sharp,
                      short range, and commensurate in contrast to incommensurate
                      spiral order observed single crystal of CoCr2O4.},
      cin          = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
                      (München) ; JCNS-FRM-II / JCNS-2},
      ddc          = {620},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-2-20110106},
      pnm          = {6G15 - FRM II / MLZ (POF3-6G15) / 6G4 - Jülich Centre for
                      Neutron Research (JCNS) (POF3-623)},
      pid          = {G:(DE-HGF)POF3-6G15 / G:(DE-HGF)POF3-6G4},
      experiment   = {EXP:(DE-MLZ)DNS-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000380359200013},
      doi          = {10.1109/TMAG.2016.2537794},
      url          = {https://juser.fz-juelich.de/record/828002},
}