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

S. F. Chen; W. J. Chang; S. J. Liu; J. Y. Juang; J. Y. Lin; K. H. 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, J. Y. Juang, J. Y. Lin, K. H. Wu, T. M. Uen, Y. S. Gou

^*Corresponding author for this work

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

3 Citations (Scopus)

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	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
Publication status	Published - 2003 Aug
Externally published	Yes

Keywords

Biepitaxial step junction
Grain boundary
LCMO
Magnetoresistance

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

Access to Document

10.1016/S0921-4526(03)00261-8

Cite this

@article{42741f91b8b04e6884b48b3a6e294f28,

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 Juang, {J. Y.} and Lin, {J. Y.} and Wu, {K. H.} and Uen, {T. M.} and Gou, {Y. S.}",

note = "Funding Information: This work was supported by the National Science Council of Taiwan, ROC under Grant Nos: NSC 91-2112-M-009-041 and NSC 91-2212-M-009-046.",

year = "2003",

month = aug,

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

language = "English",

volume = "336",

pages = "267--274",

journal = "Physica B: Condensed Matter",

issn = "0921-4526",

publisher = "Elsevier",

number = "3-4",

}

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, J. Y.

AU - Lin, J. Y.

AU - Wu, K. H.

AU - Uen, T. M.

AU - Gou, Y. S.

N1 - Funding Information: This work was supported by the National Science Council of Taiwan, ROC under Grant Nos: NSC 91-2112-M-009-041 and NSC 91-2212-M-009-046.

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

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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

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EP - 274

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

IS - 3-4

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