Reversible Phase Change Characteristics of Cr-Doped Sb2Te3 Films with Different Initial States Induced by Femtosecond Pulses

• DOI: 10.1021/acsami.6b06667
• Publication Date: 2016-07-26T15:27:26Z
• Authors: Qing Wang; Minghui Jiang; Bo Liu; Yang Wang; Yonghui Zheng; Sannian Song; Yiqun Wu; Zhitang Song; Songlin Feng
• Keywords: Thermal Stability

As a kind of chalcogenide alloy, phase change material has been widely used as novel storage medium in optical disk or electrical memory. In this paper, femtosecond pulses are to study the reversible transition processes Cr-doped Sb2Te3 films with different initial states. The SET all induced by multiple and relate increase crystallized partial irradiated spot. When Cr concentration is 5.3 at % 10.5 %, crystallization mechanism still growth-dominated Sb2Te3, which beneficial for high speed density storage, whereas necessary energy increases more Cr-dopants, leading higher amorphous thermal stability. RESET results show that Cr-dopants will not power consumption, could greatly antioxidant capacity. Single-pulse experiments process involves competition melting/amorphization recrystallization. SET/RESET on states quite from each other, mainly due surroundings around Crystalline provide conductivity lead easier crystallization, were reverse. All all, suitable composition have advantages density, better stability, lower consumption; ensure performances.