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Pecularities of EPR spectra of the Gd impurity in the Sn-Rich Pb1−x Sn x Te(Gd) solid solutions |
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| Authors: | D Zayachuk Ye Polyhach E Slynko O Khandozhko C Rudowicz |
| Institution: | 1. Semiconductor Electronics Department, Lviv Polytechnic National University, ulitsa Bandera 12, 78013, Lviv, Ukraine 2. Institute of Material Science, National Academy of Sciences of Ukraine, Chernivtsy, Ukraine 3. Chernivtsy National University, Chernivtsy, Ukraine 4. City University of Hong Kong, Hong Kong, SAR |
| Abstract: | An electron paramagnetic resonance (EPR) experimental study of crystalline and powder p-Pb1?x?y Sn y Gd y Te samples for various matrix compositionx and Gd contenty has been carried out. The study reveals that grinding the crystals into powder as well as their low-temperature annealing turns Gd impurity ions from the EPR-silent Gd2+ state to the EPR-active Gd3+ state, whereas high-temperature annealing in vacuum quenches EPR signals from Gd3+ ions. The experimental results are interpreted in terms of a model assuming that the trivalent charge state of the Gd impurity ions in lead and tin tellurides is a component part of the “substituting Gd impurity-Te vacancy” complex. |
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