The influence of grain boundary on the conductivity of donor doped SrTiO3

Fumimasa Horikiri; Li Qun Han; Atsushi Kaimai; Takanori Otake; Keiji Yashiro; Tatsuya Kawada; Junichiro Mizusaki

doi:10.1016/j.ssi.2006.03.023

The influence of grain boundary on the conductivity of donor doped SrTiO₃

Fumimasa Horikiri, Li Qun Han, Atsushi Kaimai, Takanori Otake, Keiji Yashiro, Tatsuya Kawada, Junichiro Mizusaki

ENV - Environmental Studies for Advanced Society

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

15 Citations (Scopus)

Abstract

The electrical conductivity of polycrystalline Sr(Ti_0.999Nb_0.001)O₃ was investigated. The conductivity was smaller by 1-2 order than that of the single crystal. The conductivity increased with temperature with the activation energy of 0.61 eV. The distribution of grain boundary nature of the polycrystalline sample was determined by Orientation Imaging Microscope (OIM) analysis. The ratio of coincident lattice boundaries was determined to be approximately 20%. The impedance of bicrystals across the grain boundary with different grain boundary type was measured. The grain boundary impedance was found to consist of two RC parallel components in series. The activation energies of them were 0.56-0.71 eV and 1.73-1.97 eV, respectively. These two processes were assigned to the grain boundary or annealed surface layer and the Schottky barrier between the bulk and the surface or the grain boundary layer. A possible conduction mechanism of polycrystalline material was considered that of the three dimensional network of the grain boundary layer.

Original language	English
Pages (from-to)	2555-2559
Number of pages	5
Journal	Solid State Ionics
Volume	177
Issue number	26-32 SPEC. ISS.
DOIs	https://doi.org/10.1016/j.ssi.2006.03.023
Publication status	Published - 2006 Oct 31

Keywords

Grain boundary
Poly crystal
Single crystal
SrTiO

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

Access to Document

10.1016/j.ssi.2006.03.023

Cite this

@article{1c81676d2b7f49eea703c145a8312c45,

title = "The influence of grain boundary on the conductivity of donor doped SrTiO3",

abstract = "The electrical conductivity of polycrystalline Sr(Ti0.999Nb0.001)O3 was investigated. The conductivity was smaller by 1-2 order than that of the single crystal. The conductivity increased with temperature with the activation energy of 0.61 eV. The distribution of grain boundary nature of the polycrystalline sample was determined by Orientation Imaging Microscope (OIM) analysis. The ratio of coincident lattice boundaries was determined to be approximately 20%. The impedance of bicrystals across the grain boundary with different grain boundary type was measured. The grain boundary impedance was found to consist of two RC parallel components in series. The activation energies of them were 0.56-0.71 eV and 1.73-1.97 eV, respectively. These two processes were assigned to the grain boundary or annealed surface layer and the Schottky barrier between the bulk and the surface or the grain boundary layer. A possible conduction mechanism of polycrystalline material was considered that of the three dimensional network of the grain boundary layer.",

keywords = "Grain boundary, Poly crystal, Single crystal, SrTiO",

author = "Fumimasa Horikiri and Han, {Li Qun} and Atsushi Kaimai and Takanori Otake and Keiji Yashiro and Tatsuya Kawada and Junichiro Mizusaki",

note = "Funding Information: The authors would like to thank Mr. Hiromichi Fujii in the Department of Nanomechanics, Tohoku University for performing OIM measurement. This work was supported by the 21 century COE Program of “Exploration of the Frontiers of Mechanical Science Based on Nanotechnology” from the Ministry of Education, Culture, Sports, Science and Technology of Japan. The present work was supported by the Grant-in-Aid for Scientific Research on Priority Area, Nanoionics (439) by the Ministry of Education, Culture, Sports, Science and Technology.",

year = "2006",

month = oct,

day = "31",

doi = "10.1016/j.ssi.2006.03.023",

language = "English",

volume = "177",

pages = "2555--2559",

journal = "Solid State Ionics",

issn = "0167-2738",

publisher = "Elsevier",

number = "26-32 SPEC. ISS.",

}

TY - JOUR

T1 - The influence of grain boundary on the conductivity of donor doped SrTiO3

AU - Horikiri, Fumimasa

AU - Han, Li Qun

AU - Kaimai, Atsushi

AU - Otake, Takanori

AU - Yashiro, Keiji

AU - Kawada, Tatsuya

AU - Mizusaki, Junichiro

N1 - Funding Information: The authors would like to thank Mr. Hiromichi Fujii in the Department of Nanomechanics, Tohoku University for performing OIM measurement. This work was supported by the 21 century COE Program of “Exploration of the Frontiers of Mechanical Science Based on Nanotechnology” from the Ministry of Education, Culture, Sports, Science and Technology of Japan. The present work was supported by the Grant-in-Aid for Scientific Research on Priority Area, Nanoionics (439) by the Ministry of Education, Culture, Sports, Science and Technology.

PY - 2006/10/31

Y1 - 2006/10/31

N2 - The electrical conductivity of polycrystalline Sr(Ti0.999Nb0.001)O3 was investigated. The conductivity was smaller by 1-2 order than that of the single crystal. The conductivity increased with temperature with the activation energy of 0.61 eV. The distribution of grain boundary nature of the polycrystalline sample was determined by Orientation Imaging Microscope (OIM) analysis. The ratio of coincident lattice boundaries was determined to be approximately 20%. The impedance of bicrystals across the grain boundary with different grain boundary type was measured. The grain boundary impedance was found to consist of two RC parallel components in series. The activation energies of them were 0.56-0.71 eV and 1.73-1.97 eV, respectively. These two processes were assigned to the grain boundary or annealed surface layer and the Schottky barrier between the bulk and the surface or the grain boundary layer. A possible conduction mechanism of polycrystalline material was considered that of the three dimensional network of the grain boundary layer.

AB - The electrical conductivity of polycrystalline Sr(Ti0.999Nb0.001)O3 was investigated. The conductivity was smaller by 1-2 order than that of the single crystal. The conductivity increased with temperature with the activation energy of 0.61 eV. The distribution of grain boundary nature of the polycrystalline sample was determined by Orientation Imaging Microscope (OIM) analysis. The ratio of coincident lattice boundaries was determined to be approximately 20%. The impedance of bicrystals across the grain boundary with different grain boundary type was measured. The grain boundary impedance was found to consist of two RC parallel components in series. The activation energies of them were 0.56-0.71 eV and 1.73-1.97 eV, respectively. These two processes were assigned to the grain boundary or annealed surface layer and the Schottky barrier between the bulk and the surface or the grain boundary layer. A possible conduction mechanism of polycrystalline material was considered that of the three dimensional network of the grain boundary layer.

KW - Grain boundary

KW - Poly crystal

KW - Single crystal

KW - SrTiO

UR - http://www.scopus.com/inward/record.url?scp=33750362438&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33750362438&partnerID=8YFLogxK

U2 - 10.1016/j.ssi.2006.03.023

DO - 10.1016/j.ssi.2006.03.023

M3 - Article

AN - SCOPUS:33750362438

SN - 0167-2738

VL - 177

SP - 2555

EP - 2559

JO - Solid State Ionics

JF - Solid State Ionics

IS - 26-32 SPEC. ISS.

ER -