X-ray diffraction pattern of nano-800 °C PrMnO3 observed (solid squares) and calculated (solid lines). Bragg reflections are indicated by tick marks and the difference pattern is also plotted.
PrMnO3: (a) Temperature dependence of the dc magnetic susceptibility for poly- and nanosamples. Lower and upper curves correspond to ZFC and FC susceptibilities, respectively; (b) temperature dependences of the reciprocal magnetic susceptibility; (c) experimental field dependences (points) of magnetization of PrMnO3 at 1.9 K for nano-800 °C (squares), nano-900 °C (circles) and poly (triangles). The solid lines 1–3 correspond to magnetization of nano-800 °C, nano-900 °C and poly without magnetic contribution of Pr3+ ions, respectively.
Temperature dependences of the real χ′ ac and imaginary χ″ ac components of the ac magnetic susceptibility of the PrMnO3 samples: (a) poly-, (b) nano-900 °C and (c) nano-800 °C measured in magnetic field of H = 5 Oe at the frequencies varied between 10 Hz and 10 kHz.
Temperature and frequency dependences of the real χ′ ac (a) and imaginary χ″ ac (b) components of the ac magnetic susceptibility of the nano-800 °C NdMnO3 sample.
Structural parameters for NdMnO3 and PrMnO3 obtained in the Rietveld refinement from x-ray patterns at room temperature.
The grain sizes, d, of REMnO3 nano- and polycrystalline powders calculated using XRD data and the Scherrer relation.
Magnetic data for REMnO3 (RE = Pr and Nd) compounds.
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