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Title: Effect of thickness on dielectric, ferroelectric, and optical properties of Ni substituted Pb(Zr0.2Ti0.8)O3 thin films

Journal Article · · Journal of Applied Physics
DOI:https://doi.org/10.1063/1.4935481· OSTI ID:1469649
ORCiD logo [1];  [1];  [1];  [2];  [3];  [1]
  1. Univ. of Puerto Rico, San Juan, PR (United States)
  2. National Physical Laboratory (CSIR), Delhi, India
  3. Univ. of St. Andrews, Scotland (United Kingdom)

We report thickness dependent dielectric, ferroelectric, and optical properties of Ni substituted Pb(Zr0.2Ti0.8)O3 thin films. The Pb(Zr0.2Ti0.8)0.70Ni0.30O3-δ (PZTNi30) thin films for various thicknesses, ranging from 5 nm to 400 nm, were fabricated by pulsed laser deposition technique. Giant dielectric dispersion, low dielectric loss, large dielectric constant ~1000–1500 from 100 Hz to 100 kHz, and diffused dielectric anomaly near 570–630 K were observed in PZTNi30 thin films. These films show well saturated ferroelectric hysteresis, with large remanent polarization. It also illustrated excellent optical transparency which decreased from 82 to 72% with increasing film thickness from 5 nm to 400 nm for the probe wavelengths ranging from 200 to 1100 nm. A decrease in direct bandgap (Eg) values from 4 eV to 3.4 eV and indirect-Eg values from 3.5 eV to 2.9 eV were observed for PZTNi30 thin films with increase in film thickness from 5 nm to 400 nm, respectively. The direct and indirect bandgaps were discussed in context of film thickness and grain size effects. Our investigations on optical properties of PZTNi30 thin films suggest that bandgap can be modified as a function of film thickness which may be useful for readers working to develop novel candidates for ferroelectric photovoltaic.

Research Organization:
Univ. of Puerto Rico, San Juan, PR (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
FG02-08ER46526
OSTI ID:
1469649
Alternate ID(s):
OSTI ID: 1225989
Journal Information:
Journal of Applied Physics, Vol. 118, Issue 18; ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 26 works
Citation information provided by
Web of Science

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Strong electro-optically active Ni-substituted Pb(Zr 0.35 Ti 0.65 )O 3 thin films: toward integrated active and durable photonic devices journal January 2018
Lead palladium titanate: A room temperature nanoscale multiferroic thin film journal February 2020
Studies of Multiferroic Palladium Perovskites text January 2019
Ferroelectric ordering and energy storage density of thin films capacitor by doping La 3 + and Sc 3 + on Pb(Zr 0.53 Ti 0.47 )O 3 using pulse laser deposition technique journal June 2019
Thickness Dependence of Ferroelectric and Optical Properties in Pb(Zr0.53Ti0.47)O3 Thin Films journal September 2019