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@ARTICLE{Piskua:607712,
      author       = {Piskuła, Zbigniew S. and Darul, Jolanta and Szafran, Maria
                      and Toliński, Tomasz and Nowicki, Waldemar},
      title        = {{E}ffects of {N}i doping on structural, magnetic and
                      catalytic properties of copper ferrite},
      journal      = {Journal of magnetism and magnetic materials},
      volume       = {591},
      issn         = {0304-8853},
      address      = {Amsterdam},
      publisher    = {North-Holland Publ. Co.},
      reportid     = {PUBDB-2024-02015},
      pages        = {171693},
      year         = {2024},
      note         = {(FP7/2007–2013) under Grant agreement no. 226716.},
      abstract     = {The aim of this work was to obtain information about the
                      influence of small quantities of Ni$^{2+}$ ion on
                      thestructural and magnetic properties of the tetragonally
                      distorted of Cu$_{1-x}$Ni$_x$Fe$_2$O4 series (with x = 0.00,
                      0.05,0.1, and 0.15 respectively). The tested ferrite system
                      was synthesized by combustion of citrate–nitrate
                      precursors.The synchrotron X-ray diffraction measurements
                      determined the phase transition temperatures (tetragonal
                      →cubic) of all samples. The change of structures under the
                      influence of temperature shows a phase transition in
                      therange of 390 – 400 ◦C for x = 0.00, 330 – 370 ◦C
                      for x = 0.05, 210 – 330 ◦C for x = 0.1 and 140 – 210
                      ◦C for x= 0.15, respectively. The initial phase transition
                      temperature decreases linearly with the decreasing c/a ratio
                      ofthe crystallographic lattice parameters for the
                      Cu$_{1-x}$Ni$_x$Fe$_2$O$_4$ oxides. Hysteresis measurements
                      were made todetermine the saturation magnetization (M$_S$)
                      and coercive field (μ$_0$H$_c$) of the samples. The values
                      of magneticmoments at room temperature determined from
                      magnetization measurements are very similar to those
                      obtainedfrom theoretical x-ray diffraction calculations.
                      Magnetic moment values per formula unit are estimated to
                      rangefrom 1.16 μB to 1.5 μB. It was found that the
                      catalytic activity of N$_2$O decomposition of samples
                      increases withincreasing nickel content.},
      cin          = {DOOR ; HAS-User},
      ddc          = {530},
      cid          = {I:(DE-H253)HAS-User-20120731},
      pnm          = {899 - ohne Topic (POF4-899) / FS-Proposal: I-20110697 EC
                      (I-20110697-EC) / FS-Proposal: I-20100021 EC
                      (I-20100021-EC)},
      pid          = {G:(DE-HGF)POF4-899 / G:(DE-H253)I-20110697-EC /
                      G:(DE-H253)I-20100021-EC},
      experiment   = {EXP:(DE-H253)D-B2-20150101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:001161997300001},
      doi          = {10.1016/j.jmmm.2023.171693},
      url          = {https://bib-pubdb1.desy.de/record/607712},
}