Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2006-02-21
refer to Physical Review Letters, 98, 146403 (2007)
Physics
Condensed Matter
Strongly Correlated Electrons
7 pages, 5 figures
Scientific paper
Electric pulse induced resistance (EPIR) switching hysteresis loops for Pr0.7Ca0.7MnO3 (PCMO) perovskite oxide films were found to exhibit an additional sharp "shuttle peak" around the negative pulse maximum for films deposited in an oxygen deficient ambient. The device resistance hysteresis loop consists of stable high resistance and low resistance states, and transition regions between them. The resistance relaxation of the "shuttle peak" and its temperature behavior as well as the resistance relaxation in the transition regions were studied, and indicate that the resistance switching relates to oxygen diffusion with activation energy about 0.4eV. An oxygen diffusion model with the oxygen ions (vacancies) as the active agent is proposed for the non-volatile resistance switching effect in PCMO.
Chen Xingming
Ignatiev Alex
Nian Y. B.
Strozier John
Wu Nan-Jian
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