Electrical Set-Reset Phenomenon in Thallium Doped Ge-Te Glasses Suitable for Phase Change Memory Applications

Author(s) Mohammad Mahbubur Rahman1, K. Rukmani1, S. Asokan2

1 Department of Physics, Bangalore University, Bangalore 560056, India

2 Department of Instrumentation and Applied Physics, Indian Institute of Science, Bangalore 560012, India
Е-mail dinar_eic@yahoo.com
Issue Volume 3, Year 2011, Number 1, Part 3
Dates Received 04 February 2011, in final form 17 June 2011, published online 22 June 2011
Citation M.M. Rahman, K. Rukmani, S. Asokan, J. Nano- Electron. Phys. 3 No1, 479 (2011)
PACS Number(s) 65.6 + a, 73.61 Jc, 77.80 Fm
Key words Chalcogenide glass (5) , Thallium doping, Electrical switching, Set-reset, Phase change memory (2) .
Ge17Te83-xTlx (x = 2, 3, 6, 8, 10) glasses have been prepared by melt quenching method and their amorphous nature was confirmed by XRD spectra. I-V characteristics and repeatability of electrical switching were investigated for all the glasses in order to find out their suitability for phase change memory applications. A comparison has been given with Ge2Sb2Te5 the most commonly used material for phase change memory application. The entire series of glasses exhibited memory type of electrical switching but only the composition Ge17Te81Tl2 was able to withstand SET-RESET pulses for more than 10 cycles. The other samples show repeatability for only a few cycles with the degradation of threshold voltage.