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Positive temperature coefficient of resistivity and negative differential resistivity in lead iron tunstate-lead zirconate titate.
- Source :
-
Applied Physics Letters . 5/25/2009, Vol. 94 Issue 21, p212903. 3p. 3 Graphs. - Publication Year :
- 2009
-
Abstract
- A tetragonal crystal of formula (PbFe0.67W0.33O3)0.2(PbZr0.53Ti0.47O3)0.8 (“PFW/PZT”) was recently found to exhibit ferroelectric switching via magnetic fields of H=0.5 T at room temperature [Kumar et al., arXiv:0812.3875v2]. In the present study we found that this material exhibits two other unusual properties: a positive temperature coefficient of resistivity (PTCR) and negative differential resistivity. These phenomena are often considered to be unrelated and PTCR usually results from grain boundary effects, but can be bulk [D. C. Sinclair and A. R. West, J. Appl. Phys. 66, 3850 (1989)]. Within the diffusion theory of Dawber and Scott [J. Phys. Condens. Mater. 16, L515 (2004)] they are necessarily related and we fitted the present data to their diffusion-limited model. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00036951
- Volume :
- 94
- Issue :
- 21
- Database :
- Academic Search Index
- Journal :
- Applied Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 40637733
- Full Text :
- https://doi.org/10.1063/1.3138781