Lattice parameters of a wurtzite-type (Zn,Mg)Se crystal as a function of temperature

Wojciech Paszkowicz 1,  Pawel Piszora 2,  Franciszek S. Firszt 3,  Hanna Męczyńska 3,  Stanisław Łęgowski 3,  Carsten Baehtz 4,  Michael Knapp 5

1. Polish Academy of Sciences, Institute of Physics, al. Lotników 32/46, Warszawa 02-668, Poland
2. Adam Mickiewicz University, Faculty of Chemistry, Grunwaldzka 6, Poznań 60-780, Poland
3. Nicolaus Copernicus University, Institute of Physics, Grudziądzka 5/7, Toruń 87-100, Poland
4. Technische Universität Darmstadt, Institute of Materials Science, Petersenstr. 23, Darmstadt 64287, Germany
5. CELLS (ALBA), Campus UAB, Barcelona 08193, Spain

Abstract

Wide gap II-VI semiconductors exhibit properties leading to various possible applications in optoelectronics. Structural and elastic properties of these materials are thus of high importance. (Zn,Mg)Se and related materials are studied since 1983 when their applications were suggested [1,2,3]. Most of considered applicatiions concern the alloys of low or moderate Mg content. Components with high-Mg-content can be used e.g. for control elements for IR optics [4]. Thin-film engineering involves tuning the lattice-parameter and bandgap values. The tuning is performed through selection of the given solid-solution composition, taking into account the need for lattice matching and required bandgap. Learning the structural and physical properties of the solution isa first step to design of layers and multilayers of desired characteristics. The opportunity of preparation of the solution as a single phase depends on the system and on the crystallisation process and its parameters. For the (Zn,Mg)Se system, the solid solution can be prepared in a broad range of Mg concentration, but the structure has been found to be different for bulk crystals than for epitaxial layers deposited on GaAs or InP. Alloying ZnSe with MgSe provides a way of tuning the ZnSe properties, in particular, its lattice parameters and bandgap increase with rising Mg content. Knowledge of bulk-crystal thermal expansivity is of importance for construction of optoelectronic devices, involving the (Zn,Mg)Se layers as building blocks. In this study, a wurtzite type (Zn,Mg)Se crystal grown by the high-pressure Bridgman method is studied by X-ray diffraction in the 10-290 K temperature range. The temperature variations of lattice parameter and thermal expansion coefficients are determined. An increase of thermal expansion coefficient with Mg content is observed.

[1] H.J. Lozykowski, P.O. Holtz, B. Monemar, J. Electron. Mater. 12 (1983) 653.

[2] T. Ohnakado, Y. Wu, Y. Kawakami, Sz. Fujita, Sg. Fujita, Jpn. J. Appl. Phys. 30 (1991) 1668.

[3] H. Okuyama, K. Nakano, T. Miyajima, K. Akimoto, Jpn. J. Appl. Phys. 30 (1991) L1620.

[3] V.M. Puzikov, Yu.A. Zagoruiko, O.A. Fedorenko, N.O. Kovalenko, Crystallogr. Rep.  49, 2004 215-216.

Related papers
  1. Pressure dependence of lattice parameter of Gadolinium Gallium Garnet crystals
  2. Lattice parameters of hard materials in the low-temperature range
  3. Rietveld refinement for Li2Si2O5 doped with vanadium
  4. High-pressure diffraction study of α and β Ge3N4
  5. Effect of annealing on the structure and microstructure of Pr doped ZrO2-Y2O3 nanocrystals
  6. Synchrotron X-ray diffraction studies of products of the steel pipe corrosion measured in the native aqueous suspension
  7. The materials science and powder diffraction beamline at ALBA
  8. Influence of Lanthanum doping on the morphotropic phase boundary in lead zirconate titanate
  9. ZnO thin films for organic/inorganic heterojunctions
  10. Optimisation of parameters of a dynamic penalty function for a test example of powder pattern indexing
  11. Wide band-gap II-VI semiconductors for optoelectronic applications
  12. Low temperature ZnMnO by ALD
  13. Study of the third order nonlinear optical properties of Zn1-xMgxSe and Cd1-xMgxSe crystals
  14. Photoelectric and Photothermal Investigations of Zn1-x-yBexMnySe Solid Solutions
  15. Substrate effect on the ground state of the magnetic order in NSMO/YBCO superlattices
  16. Method of Manganese co-doping of LT ZnO films
  17. Ferromagnetism in ZnO:Mn thin films deposited by PEMOCVD
  18. Structure properties of bulk ZnO crystals
  19. Magnetic anisotropy and structural properties of ferromagnet/MgO/ferromagnet system
  20. Growth and properties of Zn1-x-yBexMnySe Crystals
  21. Rietveld refinement for polycrystalline indium nitride
  22. LATTICE PARAMETERS OF INDIUM NITRIDE IN THE 22-310 K TEMPERATURE RANGE
  23. Promising high quality short period Fe/Fe-N multilayers deposited by the sputtering
  24. Structural and Magnetic Properties of Cr/Gd Multilayers Deposited on Sapphire and MgO Substrates
  25. X-ray diffraction studies of thermal-expansion with the use of 1D detectors installed at synchrotron beamlines
  26. Sensitivity of a genetic algorithm to the mutation rate parameter value: results for a crystallographic test
  27. Rietveld refinement of powder diffraction data collected with a laboratory diffractometer equipped with a linear X-ray detector
  28. Phase relationships in annealed Cu-Al-O layers
  29. Growth and characterization of thin films of ZnO by Atomic Layer Epitaxy
  30. Area detector as a tool to study properties of the magnetic multilayers by the neutron scattering
  31. Influence of hydrogen adsorption on magnetic properties of Fe films and multilayers
  32. Transmission electron microscopy and X-ray diffraction study of α'-Al2 CO crystals
  33. Diamond as X-ray Wavelength Standard for Thermal-Expansion Studies Using Synchrotron Sources
  34. X-Ray Study of Lattice Parameters of GaN in a Broad Temperature Range
  35. X-ray powder diffraction investigation of lithium manganese spinel oxides with cubic, tetragonal and orthorhombic structure.

Presentation: Poster at 11th European Powder Diffraction Conference, Poster session, by Wojciech Paszkowicz
See On-line Journal of 11th European Powder Diffraction Conference

Submitted: 2008-07-25 01:14
Revised:   2008-07-25 01:47
Google
 
Web science24.com
© 1998-2008 pielaszek research, all rights reserved Powered by the Conference Engine