ELECTRICAL AND THERMAL-PROPERTIES OF GE40S60 FILMS

Films of the composition Ge40S60 have been studied in the temperature range of 313-423 K for electrical conductivity, and 293-373 K for ther mal conductivity. The dc conductivity results indicate a single value activation energy of 0.863 eV for the conductivity in the applied temp erature range. The thermal conductivity coefficient increases linearly with temperature at a thickness of d = 0.311 cm. It was found that th e investigated samples show a memory effect. The threshold switching v oltage was found to increase linearly with film thickness. Moreover, t he threshold voltage decreases exponentially with temperature. The dat a are analysed using a thermal model for the switching process.