Influence of annealing treatment on phase transformation of Ga15Se77Tl8 thin films

  • Ravi P. Tripathi
  • M. Shaheer Akhtar
  • M. A. Alvi
  • Shamshad A. Khan


The present work describes the first order phase transformation in chalcogenide Ga15Se77Tl8 thin films. Simple melt quenching method was applied to prepare the bulk Ga15Se77Tl8 samples. Ga15Se77Tl8 thin films were prepared by the thermal evaporation on glass and silicon wafer substrates under the vacuum condition of 10−5 Torr. The amorphous and glassy nature of synthesized sample was verified by differential scanning calorimeter. The phase transformation was studied at different temperatures of 343, 358 and 373 K for 2 h. The crystalline, morphological and optical properties were analysed to explain the phase transformation in as grown and thermally annealed films at different temperatures. It was found that as grown film revealed the amorphous nature, while the annealed films possessed the polycrystalline nature. From optical properties, the values of extinction (k) and absorption (α) coefficient for Ga15Se77Tl8 thin films enhanced with the increase of the incident photon energy as well as annealed temperature. The decrease in the optical band gap with respect to annealed temperatures was described on the basis of phase transformation from amorphous to polycrystalline state.


Phase Change Material Chalcogenide Glass Sb2S3 Annealed Film Phase Change Memory 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



We are thankful to UGC, New Delhi, for providing financial assistance under the project Grant No. (UGC Project: 42-780/2013 SR).


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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  1. 1.Department of PhysicsSt. Andrew’s CollegeGorakhpurIndia
  2. 2.New and Renewable Energy Materials Development Center (New REC)Chonbuk National UniversityJeonbukRepublic of Korea
  3. 3.Department of PhysicsKing Abdulaziz UniversityJeddahSaudi Arabia

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