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Influence of silver concentration in Agx(Sb0.40S0.60)100-x thin amorphous films on photoinduced crystallization

J. GUTWIRTH1,* , T. WÁGNER1, P. BEZDIČKA2, E. KOTULÁNOVÁ2, MIL. VLČEK3, S. O. KASAP4, M. FRUMAR1

Affiliation

  1. University of Pardubice, Faculty of Chemical Technology, Research Centre LC 523 and Department of General and Inorganic Chemistry, Legions’ sq. 565, 53210 Pardubice, Czech Republic
  2. Institute of Inorganic Chemistry, AS CR v.v.i., 25068 Husinec-Rez, Czech Republic
  3. Joint Laboratory of Solid State Chemistry of University of Pardubice and Institute of Macromolecular Chemistry AS CR v.v.i., Studentska 84, 53210 Pardubice, Czech Republic
  4. University of Saskatchewan, Department of Electrical Engineering, Campus Dr. 57, Saskatoon S7N 5A9, Canada

Abstract

Thin amorphous films from ternary system (Ag)-Sb-S were prepared as potential candidates for new phase-change memory films. Amorphous Agx(Sb40S60)100-x thin films were deposited by thermal evaporation of Sb33S67 bulk combined with optically induced diffusion and dissolution of Ag. Prepared samples were characterized by electron microprobe (SEM-EDX), UV-Vis-NIR and Raman spectroscopy and by differential scanning calorimetry (DSC). The phase-change recording process in prepared films was tested via photocrystallization experiments done by Ar+ ion laser. Morphology of the laser exposed dots was observed by scanning electron microscopy (SEM) and transmission optical microscopy. Micro X-ray diffraction (μ- XRD) was used for exposed dots crystallinity study. Kinetics of the phase transition was traced by measurement of optical transmission in dependence on laser exposure time (photocrystallization kinetic curve). The aim of this work is to study thermal and optical properties of prepared thin films as well as their crystallization behavior. Obtained results are discussed and confronted with the results found on thin films of the same system with different compositions and/or prepared by different techniques..

Keywords

Ag-Sb-S films, Amorphous, Photoinduced crystallization.

Submitted at: July 3, 2007
Accepted at: Oct. 15, 2007

Citation

J. GUTWIRTH, T. WÁGNER, P. BEZDIČKA, E. KOTULÁNOVÁ, MIL. VLČEK, S. O. KASAP, M. FRUMAR, Influence of silver concentration in Agx(Sb0.40S0.60)100-x thin amorphous films on photoinduced crystallization, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 10, pp. 3064-3071 (2007)