Electrical conductivity of insulating SrTiO3 and LaGaO 3 at phase transitions

Daisuke Matsumoto; Mizuki Yamato; Yousuke Urakami; Yukio Watanabe

doi:10.1080/00150190701196146

Electrical conductivity of insulating SrTiO₃ and LaGaO ₃ at phase transitions

Daisuke Matsumoto, Mizuki Yamato, Yousuke Urakami, Yukio Watanabe

Condensed Matter Physics

Research output: Contribution to journal › Conference article › peer-review

3 Citations (Scopus)

Abstract

We have studied the extremely small conductivity of the nominally stoichiometric insulating single crystals LaGaO3and SrTiO3 in the dark. The conductivity of the LaGaO3 and SrTiO3 crystals exhibits activation type temperature dependence. We have found that the conductivity of the LaGaO3 crystal changes at the ferro-elastic-like phase transition. However, unlike the our previous report on the insulating BaTiO3 and relaxor ferroelectric single crystals, the conductivity of both LaGaO3and SrTiO3 crystals do not peak. Therefore, the ferroelectric phase transition or the existence of the spontaneous polarization is essential for the peaking in the conductivity-temperature characteristics to occur.

Original language	English
Pages (from-to)	58-61
Number of pages	4
Journal	Ferroelectrics
Volume	348
DOIs	https://doi.org/10.1080/00150190701196146
Publication status	Published - 2007
Event	8th Russia/CIS/Baltic/Japan Symposium on Ferroelectricity, RCBJSF-8 - Tsukuba, Japan Duration: May 15 2006 → May 19 2006

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1080/00150190701196146

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title = "Electrical conductivity of insulating SrTiO3 and LaGaO 3 at phase transitions",

abstract = "We have studied the extremely small conductivity of the nominally stoichiometric insulating single crystals LaGaO3and SrTiO3 in the dark. The conductivity of the LaGaO3 and SrTiO3 crystals exhibits activation type temperature dependence. We have found that the conductivity of the LaGaO3 crystal changes at the ferro-elastic-like phase transition. However, unlike the our previous report on the insulating BaTiO3 and relaxor ferroelectric single crystals, the conductivity of both LaGaO3and SrTiO3 crystals do not peak. Therefore, the ferroelectric phase transition or the existence of the spontaneous polarization is essential for the peaking in the conductivity-temperature characteristics to occur.",

author = "Daisuke Matsumoto and Mizuki Yamato and Yousuke Urakami and Yukio Watanabe",

note = "Funding Information: This work is supported by Grants-in-aid for Scientific Research from JSPS No. 16340093 and No. 17651063.; 8th Russia/CIS/Baltic/Japan Symposium on Ferroelectricity, RCBJSF-8 ; Conference date: 15-05-2006 Through 19-05-2006",

year = "2007",

doi = "10.1080/00150190701196146",

language = "English",

volume = "348",

pages = "58--61",

journal = "Ferroelectrics",

issn = "0015-0193",

publisher = "Taylor and Francis Ltd.",

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TY - JOUR

T1 - Electrical conductivity of insulating SrTiO3 and LaGaO 3 at phase transitions

AU - Matsumoto, Daisuke

AU - Yamato, Mizuki

AU - Urakami, Yousuke

AU - Watanabe, Yukio

N1 - Funding Information: This work is supported by Grants-in-aid for Scientific Research from JSPS No. 16340093 and No. 17651063.

PY - 2007

Y1 - 2007

N2 - We have studied the extremely small conductivity of the nominally stoichiometric insulating single crystals LaGaO3and SrTiO3 in the dark. The conductivity of the LaGaO3 and SrTiO3 crystals exhibits activation type temperature dependence. We have found that the conductivity of the LaGaO3 crystal changes at the ferro-elastic-like phase transition. However, unlike the our previous report on the insulating BaTiO3 and relaxor ferroelectric single crystals, the conductivity of both LaGaO3and SrTiO3 crystals do not peak. Therefore, the ferroelectric phase transition or the existence of the spontaneous polarization is essential for the peaking in the conductivity-temperature characteristics to occur.

AB - We have studied the extremely small conductivity of the nominally stoichiometric insulating single crystals LaGaO3and SrTiO3 in the dark. The conductivity of the LaGaO3 and SrTiO3 crystals exhibits activation type temperature dependence. We have found that the conductivity of the LaGaO3 crystal changes at the ferro-elastic-like phase transition. However, unlike the our previous report on the insulating BaTiO3 and relaxor ferroelectric single crystals, the conductivity of both LaGaO3and SrTiO3 crystals do not peak. Therefore, the ferroelectric phase transition or the existence of the spontaneous polarization is essential for the peaking in the conductivity-temperature characteristics to occur.

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DO - 10.1080/00150190701196146

M3 - Conference article

AN - SCOPUS:34547317928

SN - 0015-0193

VL - 348

SP - 58

EP - 61

JO - Ferroelectrics

JF - Ferroelectrics

T2 - 8th Russia/CIS/Baltic/Japan Symposium on Ferroelectricity, RCBJSF-8

Y2 - 15 May 2006 through 19 May 2006

ER -

Electrical conductivity of insulating SrTiO₃ and LaGaO ₃ at phase transitions

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