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Magnetic and Transport Properties of PrNi Single Crystal

100%
Maťaš S., Zentková M., Mihalik M.
Acta Physica Polonica A
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2008
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vol. 113
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issue 1
319-322
EN
Frequency dependence of χ"(T), different position of a maximum in χ"(T) for different crystal orientations, hysteretic behavior between magnetization measurements in zero-field cooling and field coolding regime are attributed to strong magneto-crystalline anisotropy of PrNi ferromagnetic single crystal with T_C=20.5 K, which is driven by crystal field effect. Applied pressure shifts T_C to higher temperatures (dT_C/dp=1 K/GPa). Susceptibility follows the Curie-Weiss law except for b-axis, which is hard magnetic axis. An anisotropic behavior was seen in resistivity measurements with the largest difference between b-axis and c-axis. Resistivity below T_C can be described by power law with ρT^{2.24} and is field dependent with a positive magnetoresistance.
2
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Magnetostructural Correlations of Nano-Sized Manganites Prepared by Different Ways

64%
Vavra M., Mihalik M., Mihalik M., Zentková M., Lazurová J., Matik M., Briančin J., Arnold Z., Maryško M.
Acta Physica Polonica A
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2014
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vol. 126
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issue 1
304-305
EN
We present the preparation and magnetostructural correlations of binary NdMnO_{3} oxide prepared by four different procedures. Nano-size particle were prepared by simple precipitation of hydroxides (PH), nitrate-glycine synthesis (NG) and self-combustion high-temperature synthesis (SHS), while sol-gel method (SG) produced particles with size of about 2 μm. The as prepared PH and SG particles exhibit amorphous structure, the orthorhombic crystal structure was observed for NG and SHS particles. As prepared PH, NG and SHS are magnetically ordered, annealing leads to magnetic ordering of SG particles.
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