Magnetoresistance of La0.7Ca0.3MnO3 thin film biepitaxial step junctions

S. F. Chen; W. J. Chang; S. J. Liu; Jenh-Yih Juang; Jiunn-Yuan Lin; Kaung-Hsiung Wu; T. M. Uen; Y. S. Gou

doi:10.1016/S0921-4526(03)00261-8

Magnetoresistance of La_0.7Ca_0.3MnO₃ thin film biepitaxial step junctions

S. F. Chen^*, W. J. Chang, S. J. Liu, Jenh-Yih Juang, Jiunn-Yuan Lin, Kaung-Hsiung Wu, T. M. Uen, Y. S. Gou

^*Corresponding author for this work

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

3 Scopus citations

Abstract

The biepitaxial La_0.7Ca_0.3MnO₃ (LCMO) thin films grown on SrTiO₃ substrates using a buffer layer of anatase TiO₂ were fabricated. The magnetoresistance (MR) of biepitaxial step junction (BSJ) across the boundary layer of biepitaxial LCMO (0 0 1) and LCMO (1 1 0) film was investigated. The temperature and field dependence of MR for BSJ are qualitatively similar to those obtained in other type of artificial grain boundaries with a comparable MR ratio at low temperatures. However, the observed linear current-voltage characteristic across BSJ is in sharp contrary to the commonly reported non-ohmic characteristics. The results are consistent with features predicted by the model of spin-dependent transport across a depressed magnetic ordering and metallic-like junction layer.

Original language	American English
Pages (from-to)	267-274
Number of pages	8
Journal	Physica B: Condensed Matter
Volume	336
Issue number	3-4
DOIs	https://doi.org/10.1016/S0921-4526(03)00261-8
State	Published - Aug 2003

Keywords

Biepitaxial step junction
Grain boundary
LCMO
Magnetoresistance

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10.1016/S0921-4526(03)00261-8

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@article{ddc53564e5fe4b9f8d1bdec4732ad9da,

title = "Magnetoresistance of La0.7Ca0.3MnO3 thin film biepitaxial step junctions",

abstract = "The biepitaxial La0.7Ca0.3MnO3 (LCMO) thin films grown on SrTiO3 substrates using a buffer layer of anatase TiO2 were fabricated. The magnetoresistance (MR) of biepitaxial step junction (BSJ) across the boundary layer of biepitaxial LCMO (0 0 1) and LCMO (1 1 0) film was investigated. The temperature and field dependence of MR for BSJ are qualitatively similar to those obtained in other type of artificial grain boundaries with a comparable MR ratio at low temperatures. However, the observed linear current-voltage characteristic across BSJ is in sharp contrary to the commonly reported non-ohmic characteristics. The results are consistent with features predicted by the model of spin-dependent transport across a depressed magnetic ordering and metallic-like junction layer.",

keywords = "Biepitaxial step junction, Grain boundary, LCMO, Magnetoresistance",

author = "Chen, {S. F.} and Chang, {W. J.} and Liu, {S. J.} and Jenh-Yih Juang and Jiunn-Yuan Lin and Kaung-Hsiung Wu and Uen, {T. M.} and Gou, {Y. S.}",

year = "2003",

month = aug,

doi = "10.1016/S0921-4526(03)00261-8",

language = "American English",

volume = "336",

pages = "267--274",

journal = "Physica B: Condensed Matter",

issn = "0921-4526",

publisher = "Elsevier",

number = "3-4",

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TY - JOUR

T1 - Magnetoresistance of La0.7Ca0.3MnO3 thin film biepitaxial step junctions

AU - Chen, S. F.

AU - Chang, W. J.

AU - Liu, S. J.

AU - Juang, Jenh-Yih

AU - Lin, Jiunn-Yuan

AU - Wu, Kaung-Hsiung

AU - Uen, T. M.

AU - Gou, Y. S.

PY - 2003/8

Y1 - 2003/8

N2 - The biepitaxial La0.7Ca0.3MnO3 (LCMO) thin films grown on SrTiO3 substrates using a buffer layer of anatase TiO2 were fabricated. The magnetoresistance (MR) of biepitaxial step junction (BSJ) across the boundary layer of biepitaxial LCMO (0 0 1) and LCMO (1 1 0) film was investigated. The temperature and field dependence of MR for BSJ are qualitatively similar to those obtained in other type of artificial grain boundaries with a comparable MR ratio at low temperatures. However, the observed linear current-voltage characteristic across BSJ is in sharp contrary to the commonly reported non-ohmic characteristics. The results are consistent with features predicted by the model of spin-dependent transport across a depressed magnetic ordering and metallic-like junction layer.

AB - The biepitaxial La0.7Ca0.3MnO3 (LCMO) thin films grown on SrTiO3 substrates using a buffer layer of anatase TiO2 were fabricated. The magnetoresistance (MR) of biepitaxial step junction (BSJ) across the boundary layer of biepitaxial LCMO (0 0 1) and LCMO (1 1 0) film was investigated. The temperature and field dependence of MR for BSJ are qualitatively similar to those obtained in other type of artificial grain boundaries with a comparable MR ratio at low temperatures. However, the observed linear current-voltage characteristic across BSJ is in sharp contrary to the commonly reported non-ohmic characteristics. The results are consistent with features predicted by the model of spin-dependent transport across a depressed magnetic ordering and metallic-like junction layer.

KW - Biepitaxial step junction

KW - Grain boundary

KW - LCMO

KW - Magnetoresistance

UR - http://www.scopus.com/inward/record.url?scp=0038447182&partnerID=8YFLogxK

U2 - 10.1016/S0921-4526(03)00261-8

DO - 10.1016/S0921-4526(03)00261-8

M3 - Article

AN - SCOPUS:0038447182

SN - 0921-4526

VL - 336

SP - 267

EP - 274

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

IS - 3-4

ER -

Magnetoresistance of La_0.7Ca_0.3MnO₃ thin film biepitaxial step junctions

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Keywords

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