Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10714114 | Physica B: Condensed Matter | 2012 | 6 Pages |
Abstract
Magnetic and photoluminescent properties of manganese-doped ZnSe crystals with different impurity concentrations were investigated. The concentration of Mn2+ ions in ZnSe crystals has been varied from 0.01 to 0.3Â at%. Magnetic and photoluminescent studies have confirmed the introduction of Mn in ZnSe crystals. It was established that Mn2+ ions are responsible for the emission bands with maximum at 616Â nm and 633Â nm, which correspond to 4T2â6A1 and 4T1â6A1 intracentre transitions of Mn2+ ions respectively. It was found that the concentration quenching of the photoluminescent bands is associated with Mn2+ ions, which are due to the formation of Mn-Mn clusters. Magnetic properties studies have shown that at high doping levels the manganese atoms form Mn-Mn clusters in ZnSe. From the temperature dependence of magnetic susceptibility of ZnSe:Mn crystals that follows the Curie-Weiss law, it was possible to estimate the Curie-Weiss temperature Î(x) and the effective Mn-Mn antiferromagnetic exchange constant (J1).
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Vadim P. Sirkeli, Dmitrii D. Nedeoglo, Natalia D. Nedeoglo, Ivan V. Radevici, Raisa L. Sobolevskaia, Konstantin D. Sushkevich, Erkki Lähderanta, Alexander V. Lashkul, Reino Laiho, Jens-Peter Biethan, Oktay Yilmazoglu, Dimitris Pavlidis,