Journal
JOURNAL OF APPLIED PHYSICS
Volume 107, Issue 12, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3431543
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Compositionally up and downgraded Bi(4-x/3)Ti(3-x)V(x)O(12) (x=0.0, 0.012, 0.03, 0.06) thin films were grown on Pt coated silicon substrates by pulsed laser deposition technique. Downgraded fabrication showed improved ferroelectric polarization in comparison to upgraded fabrication. Films deposited at 650 and 700 degrees C showed very large remnant polarization (2P(r)) value of 82 mu C cm(-2), which is comparatively large among all bismuth based thin films reported so far. A mechanism based on vanadium enrich seeded layer formation in the downgraded structure is proposed for the improvement. Moreover, frequency independent behavior (100Hz-5kHz) of the graded films ensures its potential application for various microelectronic devices. (c) 2010 American Institute of Physics. [doi :10.1063/1.3431543]
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