Pyroelectric response of ferroelectric nanowires: Size effect and electric energy harvesting

Morozovska, A. N.; Eliseev, E. A.; Svechnikov, G. S.; Kalinin, S. V.

doi:doi:10.1063/1.3474964

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Analysis of the degradation induced by focused ion Ga³⁺ beam for the realization of piezoelectric nanostructures

Piezoelectric nanostructures (islands of dimensions in the lateral size range 50–500 nm) have been fabricated by focused Ga3+ ion beam (FIB) etching on PbZr0.54Ti0.46O3 thin films obtained by magnetron sputtering. The degradation induced by the etching process is investigated through the evolution of electromechanical activity measured by means of local piezoelectric hysteresis loops produced by piezoresponse force microscopy. The analysis of surface potential is performed by kelvin force micro...

Ferroelectric microdomains and microdomain arrays recorded in strontium–barium niobate crystals in the field of atomic force microscope

Microdomains and various one-dimensional (1D)- and two-dimensional (2D)-microdomain arrays were formed under dc-voltages applied to the tip of an atomic force microscope (AFM) in ferroelectric SrxBa1−xNb2O6 crystals. Detailed studies of the characteristics of the AFM—recording and decay kinetics of the written arrays have shown that the crucial factors of the stability of a domain array are its dimensionality and discreteness (described by a distance Δ between the recorded point domains forming...

The size effect on pyroelectric response of ferroelectric nanowires is analyzed. The pyroelectric coefficient strongly increases with the wire radius decrease and diverges at critical radius R_cr corresponding to the size-driven transition into paraelectric phase. Size-driven enhancement of pyroelectric coupling leads to the giant pyroelectric current and voltage generation by the polarized ferroelectric nanoparticles in response to the temperature fluctuation. The maximum efficiency of the pyroelectric energy harvesting and bolometric detection is derived, and is shown to approach the Carnot limit for low temperatures.

Article Outline

INTRODUCTION
BASIC EQUATIONS
DISCUSSION

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KEYWORDS and PACS

Keywords

ferroelectric materials, nanoparticles, nanowires, pyroelectricity, size effect

PACS

77.70.+a

Pyroelectric and electrocaloric effects
77.80.B-

Phase transitions and Curie point
73.63.Nm

Quantum wires

ARTICLE DATA

Digital Object Identifier

http://dx.doi.org/10.1063/1.3474964

PUBLICATION DATA

ISSN

0021-8979 (print)

1089-7550 (online)

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American Institute of Physics

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