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Dielectric Properties of Pulsed Laser Deposited SrTiO3 Thin Films

Published online by Cambridge University Press:  10 February 2011

A. M. Clark ,
Jianhua Hao ,
Weidong Si  and
X. X. Xi
A. M. Clark
Affiliation:
Department of Physics, The Pennsylvania State University, University Park, PA 16802
Jianhua Hao
Affiliation:
Department of Physics, The Pennsylvania State University, University Park, PA 16802
Weidong Si
Affiliation:
Department of Physics, The Pennsylvania State University, University Park, PA 16802
X. X. Xi
Affiliation:
Department of Physics, The Pennsylvania State University, University Park, PA 16802
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Abstract

Low frequency dielectric loss and nonlinearity in pulsed laser deposited SrTiO3 thin films were studied. A low loss tangent in the order of 10−4, close to the level found in SrTiO3 single crystals, was observed. Combined with a large tunability, this resulted in a figure of merit for frequency and phase agile materials that can rival that observed in single crystals. The SrTiO3 thin films with thickness ranging from 25 nm to 2.5μ1 were grown on SrRuO3 electrode layers. The loss depends strongly on the thickness, but differently above and below T ∼ 80 K. Our result suggests that, in the high temperature regime, the interfacial dead layer effect dominates while, in the low temperature regime, the losses related to the structural phase transition and quantum fluctuations are important. The effect of interfacial potential was studied by using different electrode materials that result in different Schottky barriers.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 541: Symposium O – Ferroelectric Thin Films VII , 1998 , 77
Copyright
Copyright © Materials Research Society 1999

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References

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