LARGE ELECTROCALORIC EFFECT IN RELAXOR FERROELECTRICS

Organic and inorganic relaxor ferroelectrics used for electrocaloric effect (ECE) applications are introduced. Relaxor ferroelectrics offer several advantages for ECE devices, e.g., infinite states without applying electric field, field-induced large polarization, no-hysteresis of heating and cooling, small-hysteresis polarization loss, room temperature phase transition, and broad temperature range. The ECE in relaxor ferroelectrics under a high electric field can be described using a theory similar to that for first-order phase transition materials. Large ECE was observed directly in high-energy electron irradiated poly(vinylidene fluoride–trifluoroethylene) (P(VDF–TrFE)) 68/32 mol% copolymers, P(VDF–TrFE–CFE) (CFE-chlorofluoroethylene) 59.2/33.6/7.2 mol% terpolymers, P(VDF–TrFE–CFE)–P(VDF–CTFE) (CTFE-chlorotrifluoroethylene) 95/5 wt% terpolymer blended films, and (PbLa)(ZrTi)O3 (PLZT) ceramic thin films. ECE reported in Pb(Sc1/2Ta1/2)O3 (PST), Pb(Mg1/3Nb2/3)O3–PbTiO3 (PMN–PT) thin films is also summarized. Finally, the perspective of ECE devices is illustrated.

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Room Temperature Phase Transition in Methylammonium Lead Iodide Perovskite Thin Films Induced by Hydrohalic Acid Additives

ChemSusChem ◽

10.1002/cssc.201600879 ◽

2016 ◽

Vol 9 (18) ◽

pp. 2656-2665 ◽

Cited By ~ 32

Author(s):

Chan Myae Myae Soe ◽

Constantinos C. Stoumpos ◽

Boris Harutyunyan ◽

Eric F. Manley ◽

Lin X. Chen ◽

...

Keyword(s):

Thin Films ◽

Phase Transition ◽

Room Temperature ◽

Temperature Phase ◽

Lead Iodide ◽

Temperature Phase Transition ◽

Methylammonium Lead Iodide ◽

Hydrohalic Acid

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Lower Critical Solution Temperature Phase Transition of Poly(PEGMA) Hydrogel Thin Films

Langmuir ◽

10.1021/acs.langmuir.1c01165 ◽

2021 ◽

Author(s):

Ekkachai Martwong ◽

Yvette Tran

Keyword(s):

Thin Films ◽

Phase Transition ◽

Lower Critical Solution Temperature ◽

Solution Temperature ◽

Temperature Phase ◽

Critical Solution Temperature ◽

Temperature Phase Transition

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Low temperature phase transition into the electrically ordered state in thin films of cytosine

phys stat sol (a) ◽

10.1002/pssa.2210290252 ◽

1975 ◽

Vol 29 (2) ◽

pp. K145-K148

Author(s):

N. I. Bogatina ◽

B. I. Verkin ◽

I. K. Yanson

Keyword(s):

Thin Films ◽

Phase Transition ◽

Low Temperature ◽

Temperature Phase ◽

Temperature Phase Transition ◽

Low Temperature Phase ◽

Ordered State

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Substrate effects on photoluminescence and low temperature phase transition of methylammonium lead iodide hybrid perovskite thin films

Applied Physics Letters ◽

10.1063/1.4993761 ◽

2017 ◽

Vol 111 (2) ◽

pp. 023902 ◽

Cited By ~ 8

Author(s):

S. A. Shojaee ◽

T. A. Harriman ◽

G. S. Han ◽

J.-K. Lee ◽

D. A. Lucca

Keyword(s):

Thin Films ◽

Phase Transition ◽

Low Temperature ◽

Temperature Phase ◽

Lead Iodide ◽

Substrate Effects ◽

Hybrid Perovskite ◽

Temperature Phase Transition ◽

Methylammonium Lead Iodide ◽

Low Temperature Phase

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Sign of the electric field gradient tensor and the nature of the low temperature phase transition in Fe(pyridine)2Cl2

Chemical Physics Letters ◽

10.1016/0009-2614(74)80018-7 ◽

1974 ◽

Vol 28 (1) ◽

pp. 68-71 ◽

Cited By ~ 10

Author(s):

W.M. Reiff ◽

R.B. Frankel ◽

B.F. Little ◽

Gary J. Long

Keyword(s):

Phase Transition ◽

Low Temperature ◽

Electric Field ◽

Electric Field Gradient ◽

Field Gradient ◽

Electric Field Gradient Tensor ◽

Temperature Phase ◽

Gradient Tensor ◽

Temperature Phase Transition ◽

Low Temperature Phase

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Magnetic trapping induced low temperature phase transition from fcc to fct in pulsed laser deposition of FePt:Al2O3 nanocomposite thin films

Applied Physics Letters ◽

10.1063/1.2768904 ◽

2007 ◽

Vol 91 (6) ◽

pp. 063120 ◽

Cited By ~ 14

Author(s):

J. J. Lin ◽

T. Zhang ◽

P. Lee ◽

S. V. Springham ◽

T. L. Tan ◽

...

Keyword(s):

Thin Films ◽

Phase Transition ◽

Low Temperature ◽

Pulsed Laser ◽

Laser Deposition ◽

Magnetic Trapping ◽

Temperature Phase ◽

Nanocomposite Thin Films ◽

Temperature Phase Transition ◽

Low Temperature Phase

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Variations of the second harmonic intensity at the low temperature phase transition IN K1-xLixTaO3under electric field

Ferroelectrics ◽

10.1080/00150199108209445 ◽

1991 ◽

Vol 124 (1) ◽

pp. 243-248 ◽

Cited By ~ 10

Author(s):

P. Voigt ◽

S. Kapphan

Keyword(s):

Phase Transition ◽

Low Temperature ◽

Electric Field ◽

Second Harmonic ◽

Temperature Phase ◽

Harmonic Intensity ◽

Temperature Phase Transition ◽

Low Temperature Phase

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Effect of Electric Field and Temperature on Average Structure and Domain Wall Motion in 0.93Bi0.5Na0.5TiO3-0.07BaTiO3Ceramic

Advances in Condensed Matter Physics ◽

10.1155/2013/830971 ◽

2013 ◽

Vol 2013 ◽

pp. 1-4

Author(s):

Jian Wang ◽

Yun Liu ◽

Andrew Studer ◽

Lasse Norén ◽

Ray Withers

Keyword(s):

Phase Transition ◽

Domain Wall ◽

Electric Field ◽

Wall Motion ◽

Domain Wall Motion ◽

High Temperature Phase ◽

Temperature Phase ◽

Temperature Phase Transition ◽

Diffraction Patterns

In situneutron powder diffraction patterns and dielectric spectra of 0.93Bi0.5Na0.5TiO3-0.07BaTiO3ceramic were investigated under different electrical fields and temperatures. An electric-field-induced phase transition from metrically cubic to metrically tetragonal, associated with strong domain wall motion, occurs. Such induced phase and domain wall motion are unchanged until the high-temperature phase transition occurs from metrically tetragonal to metrically cubic. All these changes are irrelevant to the observed depolarization temperature (75°C). The depolarization behaviour is thus suggested to be associated with the local structure caused by the octahedral tilt twinning disorder.

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