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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:Far - infrared and magnetic properties of Co doped PbTe (ZCo = 4 x 10(19) at./cm(3)) single crystal are investigated in a broad range of temperature and magnetic fields. Far - infrared reflection spectra were analyzed using a fitting procedure based on the modified plasmon - ionised impurity - phonon interaction model. Together with the strong coupling we obtained three local modes of Co at about 125, 190 and 275 cm(-1), which corresponded to the impurity atoms in different valence states. A magnetic measurement shows that doping PbTe by Co causes appearance of paramagnetic properties