Impedance and ionic conduction of single crystalline BaTi2O5

Hirokazu Katsui; Keiji Shiga; Takashi Goto

doi:10.1016/j.matchemphys.2016.10.031

Impedance and ionic conduction of single crystalline BaTi₂O₅

Hirokazu Katsui, Keiji Shiga, Takashi Goto

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

5 Citations (Scopus)

Abstract

Electrical properties of single-crystalline BaTi₂O₅, prepared by a floating zone method, were examined by AC impedance spectroscopy at frequencies of 10⁻² to 10⁶ Hz at temperatures of 425–970 K. Complex impedance in a direction perpendicular to (001) was exhibited by a single resistor (R)–capacitor (C) parallel circuit. In the direction perpendicular to (010), four R–C parallel circuits were involved: two R–C circuits were associated with a strong temperature-dependent ferroelectric response and a slightly temperature-dependent paraelectric response, while the other two R–C circuits corresponded to the interface phenomena associated with ionic conduction. The electrical conductivity in the direction perpendicular to (010) was one-to-three orders of magnitude higher than that in the direction perpendicular to (001).

Original language	English
Pages (from-to)	75-80
Number of pages	6
Journal	Materials Chemistry and Physics
Volume	186
DOIs	https://doi.org/10.1016/j.matchemphys.2016.10.031
Publication status	Published - 2017 Jan 15

Keywords

Ferroelectricity
Impedance
Ionic conductivity
Single crystalline BaTiO

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics

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@article{6e01f8f6b9b94088ac0a1da2db76a34a,

title = "Impedance and ionic conduction of single crystalline BaTi2O5",

abstract = "Electrical properties of single-crystalline BaTi2O5, prepared by a floating zone method, were examined by AC impedance spectroscopy at frequencies of 10−2 to 106 Hz at temperatures of 425–970 K. Complex impedance in a direction perpendicular to (001) was exhibited by a single resistor (R)–capacitor (C) parallel circuit. In the direction perpendicular to (010), four R–C parallel circuits were involved: two R–C circuits were associated with a strong temperature-dependent ferroelectric response and a slightly temperature-dependent paraelectric response, while the other two R–C circuits corresponded to the interface phenomena associated with ionic conduction. The electrical conductivity in the direction perpendicular to (010) was one-to-three orders of magnitude higher than that in the direction perpendicular to (001).",

keywords = "Ferroelectricity, Impedance, Ionic conductivity, Single crystalline BaTiO",

author = "Hirokazu Katsui and Keiji Shiga and Takashi Goto",

note = "Funding Information: This study was supported by the Ministry of Education, Culture, Sports, Science, and Technology , Grant-in-Aid for Young Scientists (A) No. 16H06121 and a cooperative program (Proposal No. 16G0405 ) of the CRDAM-IMR, Tohoku University , Japan. Publisher Copyright: {\textcopyright} 2016 Elsevier B.V.",

year = "2017",

month = jan,

day = "15",

doi = "10.1016/j.matchemphys.2016.10.031",

language = "English",

volume = "186",

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journal = "Materials Chemistry and Physics",

issn = "0254-0584",

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TY - JOUR

T1 - Impedance and ionic conduction of single crystalline BaTi2O5

AU - Katsui, Hirokazu

AU - Shiga, Keiji

AU - Goto, Takashi

N1 - Funding Information: This study was supported by the Ministry of Education, Culture, Sports, Science, and Technology , Grant-in-Aid for Young Scientists (A) No. 16H06121 and a cooperative program (Proposal No. 16G0405 ) of the CRDAM-IMR, Tohoku University , Japan. Publisher Copyright: © 2016 Elsevier B.V.

PY - 2017/1/15

Y1 - 2017/1/15

N2 - Electrical properties of single-crystalline BaTi2O5, prepared by a floating zone method, were examined by AC impedance spectroscopy at frequencies of 10−2 to 106 Hz at temperatures of 425–970 K. Complex impedance in a direction perpendicular to (001) was exhibited by a single resistor (R)–capacitor (C) parallel circuit. In the direction perpendicular to (010), four R–C parallel circuits were involved: two R–C circuits were associated with a strong temperature-dependent ferroelectric response and a slightly temperature-dependent paraelectric response, while the other two R–C circuits corresponded to the interface phenomena associated with ionic conduction. The electrical conductivity in the direction perpendicular to (010) was one-to-three orders of magnitude higher than that in the direction perpendicular to (001).

AB - Electrical properties of single-crystalline BaTi2O5, prepared by a floating zone method, were examined by AC impedance spectroscopy at frequencies of 10−2 to 106 Hz at temperatures of 425–970 K. Complex impedance in a direction perpendicular to (001) was exhibited by a single resistor (R)–capacitor (C) parallel circuit. In the direction perpendicular to (010), four R–C parallel circuits were involved: two R–C circuits were associated with a strong temperature-dependent ferroelectric response and a slightly temperature-dependent paraelectric response, while the other two R–C circuits corresponded to the interface phenomena associated with ionic conduction. The electrical conductivity in the direction perpendicular to (010) was one-to-three orders of magnitude higher than that in the direction perpendicular to (001).

KW - Ferroelectricity

KW - Impedance

KW - Ionic conductivity

KW - Single crystalline BaTiO

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