Study of the miscible character in the liquid state on the Ag-Ge-Se system
A new type of electrical memory based upon Ag–Ge–Se thin films was recently proposed. The Programmable Metallization Cell is a nanometric Ni/AgGeSe/Ag cell which electrical characteristics undergo drastic changes (resistive/conductive) upon electrical polarisation. A clear understanding of the phenomenon underlying such a change is still lacking. Our team has recently carried out a series of investigation on the Agx(Ge0.25Se0.75)100–x bulk glasses (x < 30 at.%). Their conductivity changed suddenly by 7-8 orders of magnitude for x ~ 10 at.%. Phase separation has been evidenced by electrical force microscopy and field emission scanning electron microscopy. Different Ag-Ag correlations depending on Ag content in the glasses were shown by combined neutron scattering (D4) and ab initio molecular dynamic simulations. In order to go further in the understanding, we now propose to elucidate the miscible character in the liquid state at different temperatures.
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PIARRISTEGUY Andrea Alejandra; CRISTIGLIO Viviana; CUELLO Gabriel; LE PARC Rozenn; PRADEL Annie and RIBES Michel. (2013). Study of the miscible character in the liquid state on the Ag-Ge-Se system. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.6-03-429
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