Alawadhi, H ; Miotkowski, I ; Lewicki, A ; Ramdas, A K ; Miotkowska, S ; McElfresh, M (2002) Magnetic susceptibility and compositional dependence of the energy gap in Cd1-xCoxTe Journal of Physics: Condensed Matter, 14 (7). pp. 4611-4620. ISSN 0953-8984
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Official URL: http://iopscience.iop.org/0953-8984/14/17/330
Related URL: http://dx.doi.org/10.1088/0953-8984/14/17/330
Abstract
Single crystals of the diluted magnetic semiconductor Cd1-xCoxTe grown by the vertical Bridgman technique are characterized by wavelength-modulated reflectivity and magnetization measurements. Low− temperature magnetization and high-temperature magnetic susceptibility analysis were used to extract the exchange integrals for up to third-neighbour Co2+pairs in the CdTe host: J1/kB = -25pm7 K, J2/kB= -3.0pm1.5 K, and J3/kB = -1.3pm0.3 K. These values correspond well to the values obtained for other Co-based II-VI diluted magnetic semiconductors and are a clear manifestation of the unusually large Co2+-Co2+ antiferromagnetic interaction. The excitonic energy gap Eg(x) of Cd1-xCoxTe in the wavelength-modulated reflectivity shows a linear monotonic increase with increasing x in the composition range studied.
Item Type: | Article |
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Source: | Copyright of this article belongs to Institute of Physics. |
ID Code: | 52370 |
Deposited On: | 03 Aug 2011 14:17 |
Last Modified: | 03 Aug 2011 14:17 |
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