Journal of Electronic Materials

, Volume 37, Issue 8, pp 1158–1162

Evaluation of Mn Uniformity in CdMnTe Crystal Grown by the Vertical Bridgman Method

  • Jijun Zhang
  • Wanqi Jie
  • Lijun Luan
  • Tao Wang
  • Dongmei Zeng
Article

DOI: 10.1007/s11664-008-0473-9

Cite this article as:
Zhang, J., Jie, W., Luan, L. et al. Journal of Elec Materi (2008) 37: 1158. doi:10.1007/s11664-008-0473-9

Abstract

Cd1−xMnxTe is a typical diluted magnetic semiconductor, as well as substrate for the epitaxial growth of Hg1−xCdxTe. In this paper, the homogeneity of a Cd1−xMnxTe (x = 0.2) single-crystal ingot grown by the vertical Bridgman method was studied. The crystal structure and quality of the as-grown ingot were evaluated. Near-infrared (NIR) transmission spectroscopy was adopted to develop a simple optical determination of the Mn concentration in the as-grown ingot. A correlation equation between cut-off wavelength λco from NIR transmission spectra and Mn concentration by inductively coupled plasma atomic emission spectrometry (ICP-AES) was established. Using this equation, we investigated the Mn concentration distribution in both the axial and radial directions of the ingot. It was found that the segregation coefficient of Mn in the axial direction of the ingot was 0.95, which is close to unity. The Mn concentration variation in the wafers from the middle part of the ingot was 0.001 mole fraction. All these results proved that homogeneous Cd0.8Mn0.2Te crystals can be grown from the vertical Bridgman method.

Keywords

Cd1xMnxTe Mn concentration segregation coefficient near-infrared transmission spectroscopy 

Copyright information

© TMS 2008

Authors and Affiliations

  • Jijun Zhang
    • 1
  • Wanqi Jie
    • 1
  • Lijun Luan
    • 1
  • Tao Wang
    • 1
  • Dongmei Zeng
    • 1
  1. 1.School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’anChina

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