LATTICE PARAMETER VALUES AND PHASE TRANSITIONS FOR THE Cu2-II-IV-S4 (Se4) (II=Mn, Fe, Co; IV=Si, Ge, Sn) MAGNETIC SEMICONDUCTOR COMPOUNDS

Authors

  • Miguel Quintero
  • Ekadink Moreno
  • Silvana Alvarez
  • Jesús Marquina
  • Carlos Rincón
  • Eugenio Quintero
  • Pedro Grima
  • José-Antonio Heano
  • Mario Alberto Macías

Abstract

X-ray powder diffraction measurements, at 300 K, and differential thermal analysis (DTA) were made on sixteen polycrystalline samples of Cu2-II-IV-S4(Se4) (II: Mn, Fe, Co; IV: Si, Ge, Sn) magnetic semiconductor compounds. The diffraction patterns were analyzed to determine lattice parameter values. The results showed that ten have tetragonal stannite structure, one has tetragonal pseudo-cubic structure, four an orthorhombic wurtz-stannite Pmn21 and two an orthorhombic pseudo-cubic F222 structure. When the values of the effective parameter ae = (V/N)1/3 are plotted against its molecular weight W, it was found that the tetragonal and orthorhombic materials lie on the same straight line. The peaks on the DTA measurements were used to determine the type of melting as well as the melting temperature. The resulting data together with the Lindemann relation were used to estimate values for the Debye temperature θD as well as for the sound velocity in the material vs.

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Published

2013-02-19

How to Cite

Quintero, M., Moreno, E., Alvarez, S., Marquina, J., Rincón, C., Quintero, E., Grima, P., Heano, J.-A., & Macías, M. A. (2013). LATTICE PARAMETER VALUES AND PHASE TRANSITIONS FOR THE Cu2-II-IV-S4 (Se4) (II=Mn, Fe, Co; IV=Si, Ge, Sn) MAGNETIC SEMICONDUCTOR COMPOUNDS. LatinAmerican Journal of Metallurgy and Materials, 28–38. Retrieved from https://www.rlmm.org/ojs/index.php/rlmm/article/view/386

Issue

2014, 34(1)

Section

Regular Articles

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