T. Plecenik, M. Tomasek, M. Belogolovskii, M. Truchly, M. Gregor, J. Noskovic, M. Zahoran, T. Roch, I. Boylo, M. Spankova, S. Chromik, P. Kus, A. Plecenik
Resistance switching effects in metal/perovskite contacts based on epitaxial c-axis oriented Y-Ba-Cu-O (YBCO) thin films with different crystallographic orientations have been studied. Three types of Ag/YBCO junctions with the contact restricted to (i) c-axis direction, (ii) ab-plane direction, and (iii) both were designed and fabricated, and their current-voltage characteristics have been measured. The type (i) junctions exhibited conventional bipolar resistance switching behavior, whereas in other two types the low-resistance state was unsteady and their resistance quickly relaxed to the initial high-resistance state. Physical mechanism based on the oxygen diffusion scenario, explaining such behavior, is discussed.
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http://arxiv.org/abs/1204.2598
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