Piezoresponse Force Microscopy

Kholkin, A. L.; Kiselev, D. A.; Heredia, Alejandro

doi:10.1016/b978-0-08-043152-9.02281-8

Cited by 3 publications

(6 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Note also that the remnant polarization P r (T) of ferroelectric relaxors does not vanish above T Curie due to the persistence of nanopolar domains interacting with each other at temperatures between T Curie and T B [42]. However, the remnant polarization is negligibly small in the relaxor state with respect to its value in the ferroelectric state [42].…”

Section: Methodsmentioning

confidence: 94%

“…The Curie temperature T Curie is expected to become nearly frequency-independent in the vicinity of the ergodic-relaxor-ferroelectric phase transition [40]. This is due to the reduction in dipole thermal fluctuations as the material is cooled below T Curie [40][41][42]. In 8/65/35 PLZT, the ferroelectric phase cannot be established upon cooling under zero electric field [43].…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Pyroelectric waste heat energy harvesting using relaxor ferroelectric 8/65/35 PLZT and the Olsen cycle

Lee

Goljahi

McKinley

et al. 2012

Smart Mater. Struct.

View full text Add to dashboard Cite

Waste heat can be directly converted into electrical energy by performing the Olsen cycle on pyroelectric materials. The Olsen cycle consists of two isothermal and two isoelectric field processes in the electric displacement versus electric field diagram. This paper reports on the electrical energy generated by lanthanum-doped lead zirconate titanate (8/65/35 PLZT) subjected to the Olsen cycle. The material was alternately dipped into a cold and a hot silicone oil bath under specified electric fields. A maximum energy density of 888 J l −1 /cycle was obtained with a 290 µm thick 8/65/35 PLZT sample for temperatures between 25 and 160 • C and electric fields cycled between 0.2 and 7.5 MV m −1. To the best of our knowledge, this is the largest pyroelectric energy density experimentally measured with multiple cycles. It corresponded to a power density of 15.8 W l −1. The electrical breakdown strength and therefore the energy and power densities of the material increased as the sample thickness was reduced from 720 to 290 µm. Furthermore, a physical model for estimating the energy harvested by ferroelectric relaxors was further validated against experimental data for a wide range of electric fields and temperatures.

show abstract

Section: Methodsmentioning

confidence: 94%

Section: Methodsmentioning

confidence: 99%

Pyroelectric waste heat energy harvesting using relaxor ferroelectric 8/65/35 PLZT and the Olsen cycle

Lee

Goljahi

McKinley

et al. 2012

Smart Mater. Struct.

View full text Add to dashboard Cite

show abstract

“…The small remnant polarization at high temperatures was evidence of the dipole disorder induced by thermal fluctuations. Note that the remnant polarization P r (T) of ferroelectric relaxors retained finite values above T p due to the persistence of nanopolar domains interacting with each other at temperatures between T p and T B [52]. temperature decreased from 240 to 10 • C as the molar fraction of lanthanum dopant increased from 5 to 10 mol%.…”

Section: Polarization Transition Temperaturesmentioning

confidence: 98%

“…The isothermal D-E loops for x/65/35 PLZT degenerate into narrow and linear loops as the temperature increases above T Curie [31]. Then, the remnant polarization P r (T) and the coercive field E C (T) become negligibly small in the relaxor state compared with their values in the ferroelectric state [52]. The relaxor-ferroelectric phase transition is typically accompanied by a large change in electric displacement D. In order to produce the maximum energy and power output by a relaxor-ferroelectric material, the relaxor-ferroelectric phase transition must take place during the Olsen cycle.…”

Section: Relaxor-ferroelectric Plztmentioning

confidence: 99%

“…The small remnant polarization at high temperatures was evidence of the dipole disorder induced by thermal fluctuations. Note that the remnant polarization P r (T) of ferroelectric relaxors retained finite values above T p due to the persistence of nanopolar domains interacting with each other at temperatures between T p and T B[52].Figure 5(b) plots the x/65/35 PLZT polarization transition temperature T p for lanthanum doping level x between 5 and 10 mol%. The values of T p are also summarized in table 1.Figure 5(b) shows that the polarization transition…”

mentioning

confidence: 99%

See 1 more Smart Citation

Pyroelectric energy conversion using PLZT ceramics and the ferroelectric–ergodic relaxor phase transition

Lee¹,

Jo²,

Lynch³

et al. 2013

Smart Mater. Struct.

View full text Add to dashboard Cite

This paper is concerned with direct conversion of waste heat into electricity by executing the Olsen cycle on lead lanthanum zirconate titanate (PLZT) ceramics undergoing a relaxor-ferroelectric phase transition. The Olsen cycle consists of two isothermal and two isoelectric field processes. First, the temperature-dependent dielectric properties were measured for x/65/35 PLZT. The polarization transition temperature of x/65/35 PLZT was found to decrease from 240 to 10 • C as x increased from 5 to 10 mol%. This suggests that the different compositions should be operated over different temperature ranges for maximum thermal to electrical energy conversion. The energy and power densities generated by the Olsen cycle using x/65/35 PLZT samples were measured by successively dipping the samples in isothermal dielectric oil baths. Large energy and power densities were obtained when the samples underwent the ergodic relaxor-ferroelectric phase transition. A maximum energy density of 1014 J l −1 per cycle was obtained with a 190 µm thick 7/65/35 PLZT sample cycled at 0.026 Hz between 30 and 200 • C and between 0.2 and 7.0 MV m −1 . To the best of our knowledge, this is the largest pyroelectric energy density ever demonstrated experimentally with ceramics, single crystals, or polymers. A maximum power density of 48 W l −1 was achieved using a 200 µm thick 6/65/35 PLZT sample for temperatures between 40 and 210 • C and electric fields between 0 and 8.5 MV m −1 at a frequency of 0.060 Hz. The maximum applied electric field and temperature swings of these materials were physically limited by dielectric breakdown and thermomechanical stress.

show abstract

Electrical polarization switching in bulk single-crystal GaFeO3

Biernacka,

Butkiewicz,

Kapcia

et al. 2023

Phys. Rev. B

View full text Add to dashboard Cite

The electrical polarization switching on a stoichiometric GaFeO 3 single crystal was measured, and a model of atomic displacements responsible for the polarization reverse was proposed. The widely adapted mechanism of polarization switching in GaFeO 3 can be applied to stoichiometric, perfectly ordered crystals. However, the grown single crystals, as well as thin films of Ga-Fe-O, show pronounced atomic disorder. Using piezoresponse force microscopy, the electrical polarization switching on a crystal surface perpendicular to the electrical polarization direction was demonstrated. Atomic disorder in the crystal was measured by x-ray diffraction and Mössbauer spectroscopy. These measurements were supported by ab initio calculations. Using analysis of atomic disorder and electronic structure calculations, the energies of defects of cations in foreign cationic sites were estimated. The energies of the polarization switch were estimated, confirming the proposed mechanism of polarization switching in GaFeO 3 single crystals.

show abstract

Piezoresponse Force Microscopy

Cited by 3 publications

References 32 publications

Pyroelectric waste heat energy harvesting using relaxor ferroelectric 8/65/35 PLZT and the Olsen cycle

Pyroelectric waste heat energy harvesting using relaxor ferroelectric 8/65/35 PLZT and the Olsen cycle

Pyroelectric energy conversion using PLZT ceramics and the ferroelectric–ergodic relaxor phase transition

Electrical polarization switching in bulk single-crystal GaFeO3

Contact Info

Product

Resources

About