Structural investigations and phase identification in (Cd, Cr)Te alloys

Abstract

Polycrystalline (Cd,Cr)Te ingots with 2.5, 5, and 25 at.% of nominal chromium content were prepared by alloying the mixture of elemental Cd, Te, and Cr2Te3 salt. The alloys were studied by means of scanning electron microscopy, X-ray diffraction, and energy dispersive X-ray spectroscopy methods in order to determine their crystallinity and phase composition. It was found that the ingots of the lowest doped material are composed of continuous CdTe:Cr host matrix with embedded Cr-related second-phase particles. With the exception of zinc-blende type Cd1−x Cr x Te, the grains of Cr–Te intermetallic compounds with μm-sized particles of pure Cr are solidified from the higher-doped melt. The mechanism of their formation was examined on the basis of the phase diagram for the Cr–Te system. Chromium solubility limit in the cadmium telluride lattice was estimated to be about 1.5 at.%.

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References

  1. 1.

    Triboulet R, Siffert P (2010) CdTe and related compounds; physics, defects, hetero- and nano-structures, crystal growth, surface and applications. Part II: crystal growth, surface and applications. Elsevier, Amsterdam

    Google Scholar 

  2. 2.

    Capper P (1994) Properties of narrow gap cadmium-based compounds. Inspec, London

    Google Scholar 

  3. 3.

    Schlesinger TE, Toney JE, Yoon H (2001) Cadmium zinc telluride and its use as a nuclear radiation detector material. Mater Sci Eng R 32:103–184

    Article  Google Scholar 

  4. 4.

    Blinowski J, Kacman P, Majewski JA (1996) Ferromagnetism in Cr-based diluted magnetic semiconductors. J Cryst Growth 159:972–975

    Article  Google Scholar 

  5. 5.

    Shoren H, Ikemoto F, Yoshida K, Tanaka N, Motizuki K (2001) First principles electronic band calculation of(Zn, Cr)Te, (Zn, Cr)Se and (Zn, Cr)S. Phys E 10:242–246

    Article  Google Scholar 

  6. 6.

    Noor NA, Ali S, Shaukat A (2011) First principles study of half-metallic ferromagnetism in Cr-doped CdTe. J Phys Chem Sol 72:836–841

    Article  Google Scholar 

  7. 7.

    Saito H, Zayets V, Yamagata S, Ando K (2003) Room-temperature ferromagnetism in a II-VI diluted magnetic semiconductor Zn1-xCrxTe. Phys Rev Lett 90:207202–1–207202-4

    Google Scholar 

  8. 8.

    Kuroda S, Ozaki N, Nishizawa N, Kumekawa T, Marcet S, Takita K (2005) Growth and magnetic properties of novel ferromagnetic semiconductor (Zn, Cr)Te. Sci Techn Adv Mater 6:558–564

    Article  Google Scholar 

  9. 9.

    Wang WG, Yee KJ, Kim DH, Han KJ, Wang XR, Ni C, Moriyama T, Mathew A, Zhu T, Opila R, Xiao JQ (2008) Microstructure, magnetic, and spin-dependent transport properties of (Zn, Cr)Te films fabricated by magnetron sputtering. Phys Rev B 77:155207–1–155207-7

    Google Scholar 

  10. 10.

    Soundararajan D, Mangalaraj D, Nataraj D, Dorosinskii Santoyo-Salazar J, Ko JM (2010) Ferromagnetism in Zn1-xCrxTe (x = 0.05, 0.15) films grown on GaAs (100) substrate. Curr Appl Phys 10:771–775

    Article  Google Scholar 

  11. 11.

    Zhang K, Akiyama R, Kanazawa K, Kuroda S, Ofuchi H (2014) Effect of acceptor co-doping on magnetism and electronic states in ferromagnetic semiconductor (Zn, Cr)Te. Phys Status Solidi C 11:1324–1327

    Article  Google Scholar 

  12. 12.

    Furdyna JK (1988) Diluted magnetic semiconductors. J Appl Phys 64:R29–R65

    Article  Google Scholar 

  13. 13.

    Dobrowolski W, Kossut J, Story T (2003) II-VI and IV-VI diluted magnetic semiconductors—new bulk materials and low dimensional quantum structures. Handbook of magnetic materials, vol 15. Elsevier, Amsterdam, pp 289–378

    Google Scholar 

  14. 14.

    Greenberg JH (1996) P-T–X phase equilibrium and vapor pressure scanning of non-stoichiometry in CdTe. J Cryst Growth 161:1–11

    Article  Google Scholar 

  15. 15.

    Chattopadhyay G (1994) The Cr-Te (chromium-tellurium) system. J Phase Equilibr 15:431–439

    Article  Google Scholar 

  16. 16.

    Dijkstra J, Weitering HH, van Bruggen CF, Haas C, de Groot RA (1989) Band-structure calculations, and magnetic and transport properties of ferromagnetic chromium tellurides (CrTe, Cr3Te4, Cr2Te3). J Phys: Condens Matter 1:9141–9161

    Google Scholar 

  17. 17.

    Ko KY, Blamire MG (2006) Temperature dependent magnetization in Cr-doped CdTe crystals. Appl Phys Lett 88:172101–1–172101-3

    Article  Google Scholar 

  18. 18.

    Begam MR, Rao NM, Kaleemulla S, Krishna NS, Kuppan M, Krishnaiah G, Subrahmanyam J (2014) Room-temperature ferromagnetism in Cd1-xCrxTe diluted magnetic semiconductor crystals. Mater Sci Semicond Process 18:146–151

    Article  Google Scholar 

  19. 19.

    Popovych VD, Sagan P, Bester M, Cienek B, Kuzma M (2015) Structural and compositional investigations of vapour grown CdTe: Cr single crystals. J Cryst Growth 426:173–179

    Article  Google Scholar 

  20. 20.

    ASTM card No. 15-0770

  21. 21.

    Cullity BD, Stock SR (1956) Elements of X-ray diffraction. Addison-Wesley, Massachusetts

    Google Scholar 

  22. 22.

    ICDD reference code 00-053-1153

  23. 23.

    ICDD reference codes 00-037-1314

  24. 24.

    ICDD reference codes 03-065-2312

  25. 25.

    ICDD reference code 00-053-0448

  26. 26.

    Programm of E-MRS Fall Meeting, Symposium W: Nanoscale phase separation in spintronic materials, superconductors, and other system, 15th–18th September, 2015, Warsaw, Poland. http://www.european-mrs.com/2015-fall-symposium-w-european-materials-research-society. Accessed 12 January 2016

Download references

Acknowledgements

The authors would thank for the support from the Polish National Science Centre under research project No. NN507264740.

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Correspondence to V. D. Popovych.

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Popovych, V.D., Sagan, P., Bester, M. et al. Structural investigations and phase identification in (Cd, Cr)Te alloys. J Mater Sci 51, 4618–4626 (2016). https://doi.org/10.1007/s10853-016-9777-y

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Keywords

  • Cadmium Telluride
  • Cr2Te3
  • CdTe Crystal
  • Ternary Solid Solution
  • Chromium Solubility