Physics – Condensed Matter – Materials Science
Scientific paper
2006-10-06
Appl. Phys. Lett. 89, 202906 (2006)
Physics
Condensed Matter
Materials Science
To be publised in Applied Physics Letters
Scientific paper
10.1063/1.2388145
In this paper, we report the electrical and structural properties of the oxide-based metal/ferroelectric/metal (MFM) junctions. The heterostructures are composed of ultrathin layers of La0.7Ca0.3MnO3 (LCMO) as a metallic layer and, BaTiO3 (BTO) as a ferroelectric layer. Junction based devices, having the dimensions of 400 x 200 micom2, have been fabricated upon LCMO/BTO/LCMO heterostructures by photolithography and Ar-ion milling technique. The DC current-voltage (I-V) characteristics of the MFM junctions were carried out. At 300 K, the devices showed the linear (I-V) characteristics, whereas at 77 K, (I-V) curves exhibited some reproducible switching behaviours with well-defined remnant currents. The resulting resistance modulation is very different from what was already reported in ultrathin ferroelectric layers displaying resistive switching. A model is presented to explain the datas
Maglione Mario
Mechin Laurence
Prellier Wilfrid
Singh Mahendra Pratap
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