Schmidt, R. and Basu, A. and Brinkman, A. W. and Klusek, Z. and Datta, P. K. (2005) 'Electron-hopping modes in NiMn2O4+δ materials.', Applied physics letters., 86 (7). 073501.
The resistance versus temperature (R-T) characteristics of NiMn2O4+delta thermistors have been analyzed. In the literature, electron transport in manganate spinels is commonly described by a small-polaron model for nearest neighbor hopping, but variable range hopping (VRH) has not been considered so far. In this study differentiated R-T data were analyzed, allowing a clear distinction between different modes of hopping. In pressed pellets and thick screen printed films conduction was well described by a VRH model for a parabolic density of states, which was confirmed by scanning tunneling spectroscopy.
|Keywords:||VRH, NNH, R-T characteristics, Thick films, sputtered films, STS.|
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|Publisher Web site:||http://dx.doi.org/10.1063/1.1866643|
|Publisher statement:||© 2005 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Schmidt, R. and Basu, A. and Brinkman, A. W. and Klusek, Z. and Datta, P. K. (2005) 'Electron-hopping modes in NiMn2O4+δ materials.', Applied physics letters., 86 (7). 073501 and may be found at http://dx.doi.org/10.1063/1.1866643|
|Record Created:||04 Dec 2006|
|Last Modified:||18 Aug 2015 13:36|
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