T − E phase diagrams and electrocaloric effect in PNN-PT solid solutions

M. V. Gorev; V. S. Bondarev; I. N. Flerov; Kārlis Bormanis; Ēriks Birks

doi:10.1016/j.jallcom.2022.167032

T − E phase diagrams and electrocaloric effect in PNN-PT solid solutions

M. V. Gorev^*
, V. S. Bondarev
, I. N. Flerov
, Kārlis Bormanis
, Ēriks Birks

^*Corresponding author for this work

Siberian Branch
Siberian Federal University

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

Using the sixth-order free energy expansion of the Landay thermodynamic potential, T − E phase diagrams and the electrocaloric effect (ECE) in solid solutions (1-x)Pb(Ni_1∕3Nb_2∕3)O₃-xPbTiO₃ (PNN-PT) were studied under an electric field along the crystallographic directions [001], [101] and [111]. The composition of the samples, temperature range, as well as magnitude and direction of the electric field significantly affect the sequence of phase transitions, stability of various crystalline phases and electrocaloric properties. Direct measurements of the intensive ECE in the 0.8PNN-0.2PT compound were carried out by the method of adiabatic calorimetry at electric field strength E = 6 kV/cm. The large electrocaloric coefficient ΔT∕ΔE = 10 μK ⋅ cm/kV indicates that this compound and other PNN-PT solutions are promising for application as solid-state refrigerants.

Original language	English
Article number	167032
Journal	Journal of Alloys and Compounds
Volume	927
DOIs	https://doi.org/10.1016/j.jallcom.2022.167032
Publication status	Published - 15 Dec 2022

Keywords

Calorimetry
Electrocaloric
Ferroelectrics
Phase diagrams
Thermodynamic modeling

OECD Field of Science

1.3 Physical Sciences

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10.1016/j.jallcom.2022.167032

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@article{ccb3dabbe14045cabb4a4d25ce6550dc,

title = "T − E phase diagrams and electrocaloric effect in PNN-PT solid solutions",

abstract = "Using the sixth-order free energy expansion of the Landay thermodynamic potential, T − E phase diagrams and the electrocaloric effect (ECE) in solid solutions (1-x)Pb(Ni1∕3Nb2∕3)O3-xPbTiO3 (PNN-PT) were studied under an electric field along the crystallographic directions [001], [101] and [111]. The composition of the samples, temperature range, as well as magnitude and direction of the electric field significantly affect the sequence of phase transitions, stability of various crystalline phases and electrocaloric properties. Direct measurements of the intensive ECE in the 0.8PNN-0.2PT compound were carried out by the method of adiabatic calorimetry at electric field strength E = 6 kV/cm. The large electrocaloric coefficient ΔT∕ΔE = 10 μK ⋅ cm/kV indicates that this compound and other PNN-PT solutions are promising for application as solid-state refrigerants.",

keywords = "Calorimetry, Electrocaloric, Ferroelectrics, Phase diagrams, Thermodynamic modeling",

author = "Gorev, \{M. V.\} and Bondarev, \{V. S.\} and Flerov, \{I. N.\} and Kārlis Bormanis and Ēriks Birks",

note = "Publisher Copyright: {\textcopyright} 2022 Elsevier B.V.",

year = "2022",

month = dec,

day = "15",

doi = "10.1016/j.jallcom.2022.167032",

language = "English",

volume = "927",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - T − E phase diagrams and electrocaloric effect in PNN-PT solid solutions

AU - Gorev, M. V.

AU - Bondarev, V. S.

AU - Flerov, I. N.

AU - Bormanis, Kārlis

AU - Birks, Ēriks

PY - 2022/12/15

Y1 - 2022/12/15

N2 - Using the sixth-order free energy expansion of the Landay thermodynamic potential, T − E phase diagrams and the electrocaloric effect (ECE) in solid solutions (1-x)Pb(Ni1∕3Nb2∕3)O3-xPbTiO3 (PNN-PT) were studied under an electric field along the crystallographic directions [001], [101] and [111]. The composition of the samples, temperature range, as well as magnitude and direction of the electric field significantly affect the sequence of phase transitions, stability of various crystalline phases and electrocaloric properties. Direct measurements of the intensive ECE in the 0.8PNN-0.2PT compound were carried out by the method of adiabatic calorimetry at electric field strength E = 6 kV/cm. The large electrocaloric coefficient ΔT∕ΔE = 10 μK ⋅ cm/kV indicates that this compound and other PNN-PT solutions are promising for application as solid-state refrigerants.

AB - Using the sixth-order free energy expansion of the Landay thermodynamic potential, T − E phase diagrams and the electrocaloric effect (ECE) in solid solutions (1-x)Pb(Ni1∕3Nb2∕3)O3-xPbTiO3 (PNN-PT) were studied under an electric field along the crystallographic directions [001], [101] and [111]. The composition of the samples, temperature range, as well as magnitude and direction of the electric field significantly affect the sequence of phase transitions, stability of various crystalline phases and electrocaloric properties. Direct measurements of the intensive ECE in the 0.8PNN-0.2PT compound were carried out by the method of adiabatic calorimetry at electric field strength E = 6 kV/cm. The large electrocaloric coefficient ΔT∕ΔE = 10 μK ⋅ cm/kV indicates that this compound and other PNN-PT solutions are promising for application as solid-state refrigerants.

KW - Calorimetry

KW - Electrocaloric

KW - Ferroelectrics

KW - Phase diagrams

KW - Thermodynamic modeling

UR - https://www.sciencedirect.com/science/article/abs/pii/S0925838822034235

UR - https://www.scopus.com/pages/publications/85137278043

U2 - 10.1016/j.jallcom.2022.167032

DO - 10.1016/j.jallcom.2022.167032

M3 - Article

SN - 0925-8388

VL - 927

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

M1 - 167032

ER -

T − E phase diagrams and electrocaloric effect in PNN-PT solid solutions

Abstract

Keywords

OECD Field of Science

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