Phase Transitions and Phonon Mode Dynamics of Ba(Cu1/3Nb2/3)O3and Sr(Cu1/3Nb2/3)O3for Understanding Thermoelectric Response

Myung Eun Song; Deepam Maurya; Yifei Wang; Jue Wang; Min Gyu Kang; David Walker; Pam A. Thomas; Scott T. Huxtable; Robert J. Bodnar; N. Q. Vinh; Shashank Priya

doi:10.1021/acsaem.0c00342

Phase Transitions and Phonon Mode Dynamics of Ba(Cu_1/3Nb_2/3)O₃and Sr(Cu_1/3Nb_2/3)O₃for Understanding Thermoelectric Response

Myung Eun Song, Deepam Maurya, Yifei Wang, Jue Wang, Min Gyu Kang, David Walker, Pam A. Thomas, Scott T. Huxtable, Robert J. Bodnar, N. Q. Vinh, Shashank Priya

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

4 Scopus citations

Abstract

We report electrical and thermal properties of perovskite-type Ba(Cu1/3Nb2/3)O3 (BCN) and Sr(Cu1/3Nb2/3)O3 (SCN). The BCN and SCN ceramics were synthesized by using the conventional solid state (CS) reaction method. The transmission electron microscopy analysis exhibited needle- and comb-type domain structures in BCN. Interestingly, SCN did not exhibit domain structure; however, it exhibited superlattice reflections due to ordering that were quite prominent in the selected area electron diffraction patterns. The temperature dependence of the dielectric response for BCN and SCN systems exhibits peaks due to structural phase transitions. The change in the Raman modes with increasing temperature also indicated the presence of phase transition in the temperature range 300-400 °C. BCN exhibited a lower value of the thermal conductivity (1.6 W/m·K at 600 °C) as compared to that of SCN (2.1 W/m·K at 600 °C) because of multiple phonon modes as identified through terahertz frequency domain spectroscopy.

Original language	English (US)
Pages (from-to)	3939-3945
Number of pages	7
Journal	ACS Applied Energy Materials
Volume	3
Issue number	4
DOIs	https://doi.org/10.1021/acsaem.0c00342
State	Published - Apr 27 2020

All Science Journal Classification (ASJC) codes

Chemical Engineering (miscellaneous)
Energy Engineering and Power Technology
Electrochemistry
Materials Chemistry
Electrical and Electronic Engineering

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@article{bddc3c59688d4c5aba291e85389d7c97,

title = "Phase Transitions and Phonon Mode Dynamics of Ba(Cu1/3Nb2/3)O3and Sr(Cu1/3Nb2/3)O3for Understanding Thermoelectric Response",

abstract = "We report electrical and thermal properties of perovskite-type Ba(Cu1/3Nb2/3)O3 (BCN) and Sr(Cu1/3Nb2/3)O3 (SCN). The BCN and SCN ceramics were synthesized by using the conventional solid state (CS) reaction method. The transmission electron microscopy analysis exhibited needle- and comb-type domain structures in BCN. Interestingly, SCN did not exhibit domain structure; however, it exhibited superlattice reflections due to ordering that were quite prominent in the selected area electron diffraction patterns. The temperature dependence of the dielectric response for BCN and SCN systems exhibits peaks due to structural phase transitions. The change in the Raman modes with increasing temperature also indicated the presence of phase transition in the temperature range 300-400 °C. BCN exhibited a lower value of the thermal conductivity (1.6 W/m·K at 600 °C) as compared to that of SCN (2.1 W/m·K at 600 °C) because of multiple phonon modes as identified through terahertz frequency domain spectroscopy.",

author = "Song, {Myung Eun} and Deepam Maurya and Yifei Wang and Jue Wang and Kang, {Min Gyu} and David Walker and Thomas, {Pam A.} and Huxtable, {Scott T.} and Bodnar, {Robert J.} and Vinh, {N. Q.} and Shashank Priya",

note = "Publisher Copyright: {\textcopyright} 2020 American Chemical Society.",

year = "2020",

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doi = "10.1021/acsaem.0c00342",

language = "English (US)",

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T1 - Phase Transitions and Phonon Mode Dynamics of Ba(Cu1/3Nb2/3)O3and Sr(Cu1/3Nb2/3)O3for Understanding Thermoelectric Response

AU - Song, Myung Eun

AU - Maurya, Deepam

AU - Wang, Yifei

AU - Wang, Jue

AU - Kang, Min Gyu

AU - Walker, David

AU - Thomas, Pam A.

AU - Huxtable, Scott T.

AU - Bodnar, Robert J.

AU - Vinh, N. Q.

AU - Priya, Shashank

PY - 2020/4/27

Y1 - 2020/4/27

N2 - We report electrical and thermal properties of perovskite-type Ba(Cu1/3Nb2/3)O3 (BCN) and Sr(Cu1/3Nb2/3)O3 (SCN). The BCN and SCN ceramics were synthesized by using the conventional solid state (CS) reaction method. The transmission electron microscopy analysis exhibited needle- and comb-type domain structures in BCN. Interestingly, SCN did not exhibit domain structure; however, it exhibited superlattice reflections due to ordering that were quite prominent in the selected area electron diffraction patterns. The temperature dependence of the dielectric response for BCN and SCN systems exhibits peaks due to structural phase transitions. The change in the Raman modes with increasing temperature also indicated the presence of phase transition in the temperature range 300-400 °C. BCN exhibited a lower value of the thermal conductivity (1.6 W/m·K at 600 °C) as compared to that of SCN (2.1 W/m·K at 600 °C) because of multiple phonon modes as identified through terahertz frequency domain spectroscopy.

AB - We report electrical and thermal properties of perovskite-type Ba(Cu1/3Nb2/3)O3 (BCN) and Sr(Cu1/3Nb2/3)O3 (SCN). The BCN and SCN ceramics were synthesized by using the conventional solid state (CS) reaction method. The transmission electron microscopy analysis exhibited needle- and comb-type domain structures in BCN. Interestingly, SCN did not exhibit domain structure; however, it exhibited superlattice reflections due to ordering that were quite prominent in the selected area electron diffraction patterns. The temperature dependence of the dielectric response for BCN and SCN systems exhibits peaks due to structural phase transitions. The change in the Raman modes with increasing temperature also indicated the presence of phase transition in the temperature range 300-400 °C. BCN exhibited a lower value of the thermal conductivity (1.6 W/m·K at 600 °C) as compared to that of SCN (2.1 W/m·K at 600 °C) because of multiple phonon modes as identified through terahertz frequency domain spectroscopy.

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Phase Transitions and Phonon Mode Dynamics of Ba(Cu_1/3Nb_2/3)O₃and Sr(Cu_1/3Nb_2/3)O₃for Understanding Thermoelectric Response

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