Estimation of Co2+ solubility limit in CdTe from lattice parameters, magnetization and spectroscopic characterization

Miotkowski, I ; Alawadhi, H ; Seong, M J ; Lewicki, A ; Souw, V ; McElfresh, M ; Ramdas, A K ; Miotkowska, S ; Dynowska, E (2001) Estimation of Co2+ solubility limit in CdTe from lattice parameters, magnetization and spectroscopic characterization Semiconductor Science and Technology, 16 (2). pp. 118-122. ISSN 0268-1242

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Official URL: http://iopscience.iop.org/0268-1242/16/2/310

Related URL: http://dx.doi.org/10.1088/0268-1242/16/2/310

Abstract

Single crystals of Cd1-xCoxTe ternaries, grown by the vertical Bridgman technique, are characterized with x-ray diffraction, electron microprobe analysis, wavelength modulated reflectivity, resonant Raman scattering and magnetization measurements. The lattice parameter decreases linearly with increasing x in the range 0≤ × ≤ 0.022, but not beyond. The Co2+ concentration estimated from magnetic measurements as well as that from microprobe analysis reveals a maximum value of x~0.02, significantly higher than that reported in the literature, suggesting that it is indeed the solubility limit of Co2+ in CdTe. The blue shift of the excitonic energy gap with increasing x, observed in wavelength modulated reflectivity and in resonant Raman scattering, confirms the substitutional incorporation of Co2+ in CdTe.

Item Type:Article
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ID Code:52368
Deposited On:03 Aug 2011 14:16
Last Modified:03 Aug 2011 14:16

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