Journal of Physical Studies 16(1/2), Article 1703 [7 pages] (2012) DOI: https://doi.org/10.30970/jps.16.1703 SPECIFIC MAGNETIC PROPERTIES OF THE Eu-DOPED PbTe SINGLE CRYSTALS D. M. Zayachuk{1}, V. I. Mikityuk{2}, A. V. Pashuk{1}, V. V. Shlemkevych{2}, K. S. Ulyanitsky{2}, D. Kaczorowski{3} {1}Lviv Polytechnic National University, 12, Bandera St., 79013 Lviv, Ukraine {2}Yuriy Fedkovych Chernivtsy National University, 2, Kotsyubynsky St., 58012 Chernivtsi, Ukraine {3}Institute of Low Temperature and Structure Research, Polish Academy of Sciences, 50-950 Wroc\l{}aw 2, P. O. Box 1410, Poland e-mail: zayachuk@polynet.lviv.ua

The magnetization \textit{M} under temperature $1.72$\,K in the range of magnetic field \textit{B} 0-5\,T and the magnetic susceptibility (MS) $χ$ under magnetic field 0.1\,T in the temperature range $1.7-400$\,K of the powder and crystal {PbTe}:{Eu} samples fabricated from the bulk and surface layers of the doped ingots grown from the melt by the Bridgman method are investigated. Specific magnetic properties in the Eu-doped PbTe single crystals are revealed: (i) the strong differences between the magnetization and MS{ }of the surface and bulk of the {PbTe}:{Eu} doped ingots; (ii) strong paramagnetism of the surface layers practically independent of $T$ in the temperature range over $30$\,K; (iii) the principal discrepancies between the temperature dependences of MS of the crystal matrix of powder and crystal doped samples. Possible mechanisms of the appearance of the mentioned peculiarities of the magnetic properties of different powder and crystal samples are analyzed.

PACS number(s): 75.20.-g, 75.30.Hx, 76.30.Kg

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