Sarkar, I. ; Sanyal, M. K. ; Takeyama, S. ; Kar, S. ; Hirayama, H. ; Mino, H. ; Komori, F. ; Biswas, S. (2009) Suppression of Mn photoluminescence in ferromagnetic state of Mn-doped ZnS nanocrystals Physical Review B: Condensed Matter and Materials Physics, 79 (5). 054410_1-054410_6. ISSN 1098-0121
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Official URL: http://prb.aps.org/abstract/PRB/v79/i5/e054410
Related URL: http://dx.doi.org/10.1103/PhysRevB.79.054410
Abstract
Magnetic ordering can tune optical properties of photoluminescent dilute magnetic semiconductors. The results of a magnetic field dependent photoluminescence (PL) up to 50 T above and below ferromagnetic transition temperature TC in Mn-doped ZnS nanocrystals have been reported here. The PL intensity corresponding to internal transition between states of Mn significantly decreases with application of magnetic field below TC but no such suppression was observed above TC even at 50 T. The zero-field PL intensity also exhibits continuous suppression with decreasing temperature in the ferromagnetic state. The PL intensity profiles could be fitted consistently using a model of magnetic-ordering-induced spin-sensitive energy transfer to Mn states below TC.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to The American Physical Society. |
| ID Code: | 61315 |
| Deposited On: | 15 Sep 2011 03:48 |
| Last Modified: | 15 Sep 2011 03:48 |
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