(La1−xCax)(Mn1−yMy)O3 (x = 0.37, 0.50, 0.75; M=Cr, Ni; y = 0.03, 0.08) compounds have been prepared reacting stoichiometric amounts of binary oxides at high temperature. The samples were characterised by means of XRPD analysis at room temperature, followed by Rietveld refinements, revealing that all these compounds crystallize with an orthorhombic structure. Magnetic characterization as a function of the temperature (ZFC and FC measurements from T = 5K up to T = 350 K) and of the magnetic field (up to μ0H= 5.5 T) was performed; various behaviours were observed depending on composition: in particular the different effects of Ni and Cr as dopant are shown and discussed.
(La,Ca)(Mn,M)O3 (M = Ni, Cr) compounds investigated by means of XRPD and DC magnetic measurements
MARTINELLI, ALBERTO;FERRETTI, MAURIZIO;
2005-01-01
Abstract
(La1−xCax)(Mn1−yMy)O3 (x = 0.37, 0.50, 0.75; M=Cr, Ni; y = 0.03, 0.08) compounds have been prepared reacting stoichiometric amounts of binary oxides at high temperature. The samples were characterised by means of XRPD analysis at room temperature, followed by Rietveld refinements, revealing that all these compounds crystallize with an orthorhombic structure. Magnetic characterization as a function of the temperature (ZFC and FC measurements from T = 5K up to T = 350 K) and of the magnetic field (up to μ0H= 5.5 T) was performed; various behaviours were observed depending on composition: in particular the different effects of Ni and Cr as dopant are shown and discussed.
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