Magnetotransport properties of Ca0.8La0.2IrO3 epitaxial films

Y. K. Liu; H. F. Wong; S. M. Ng; K. K. Lam; C. L. Mak; C. W. Leung

doi:10.1016/j.matlet.2017.11.033

Magnetotransport properties of Ca_0.8La_0.2IrO₃ epitaxial films

Y. K. Liu, H. F. Wong, S. M. Ng, K. K. Lam, C. L. Mak, C. W. Leung

Research output: Journal article publication › Journal article › Academic research › peer-review

1 Citation (Scopus)

Abstract

We fabricated high-quality epitaxial Ca_0.8La_0.2IrO₃ (CLIO) films on SrTiO₃ (STO), (LaAlO₃)_0.3(Sr₂AlTaO₆)_0.7 (LSAT) and NdGaO₃ (NGO) substrates by pulsed laser deposition, and systematically studied their transport properties. All samples showed insulating behavior, but the resistivity of CLIO/NGO film showed relatively weak temperature dependence and can be regarded as a poor metallic behavior. The carrier transport in all the samples were dominated by the Mott-type variable range hopping. The magnetoresistance of CLIO/NGO showed a value about 6%, larger than that of CLIO/STO and CLIO/LSAT, while the CLIO/STO sample showed very large magnetic moment and small coercive field. These findings indicate that mechanical strain can be a useful route to explore the unusual physics of iridates with strong spin-orbit coupling.

Original language	English
Pages (from-to)	135-137
Number of pages	3
Journal	Materials Letters
Volume	213
DOIs	https://doi.org/10.1016/j.matlet.2017.11.033
Publication status	Published - 15 Feb 2018

Keywords

Epitaxial thin films
Iridates
Magnetoresistance
Spin-orbital coupling

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

More information

10.1016/j.matlet.2017.11.033

http://hdl.handle.net/10397/100360

Cite this

@article{1bd745611d2044279d26255078125e1d,

title = "Magnetotransport properties of Ca0.8La0.2IrO3 epitaxial films",

abstract = "We fabricated high-quality epitaxial Ca0.8La0.2IrO3 (CLIO) films on SrTiO3 (STO), (LaAlO3)0.3(Sr2AlTaO6)0.7 (LSAT) and NdGaO3 (NGO) substrates by pulsed laser deposition, and systematically studied their transport properties. All samples showed insulating behavior, but the resistivity of CLIO/NGO film showed relatively weak temperature dependence and can be regarded as a poor metallic behavior. The carrier transport in all the samples were dominated by the Mott-type variable range hopping. The magnetoresistance of CLIO/NGO showed a value about 6%, larger than that of CLIO/STO and CLIO/LSAT, while the CLIO/STO sample showed very large magnetic moment and small coercive field. These findings indicate that mechanical strain can be a useful route to explore the unusual physics of iridates with strong spin-orbit coupling.",

keywords = "Epitaxial thin films, Iridates, Magnetoresistance, Spin-orbital coupling",

author = "Liu, {Y. K.} and Wong, {H. F.} and Ng, {S. M.} and Lam, {K. K.} and Mak, {C. L.} and Leung, {C. W.}",

year = "2018",

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language = "English",

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TY - JOUR

T1 - Magnetotransport properties of Ca0.8La0.2IrO3 epitaxial films

AU - Liu, Y. K.

AU - Wong, H. F.

AU - Ng, S. M.

AU - Lam, K. K.

AU - Mak, C. L.

AU - Leung, C. W.

PY - 2018/2/15

Y1 - 2018/2/15

N2 - We fabricated high-quality epitaxial Ca0.8La0.2IrO3 (CLIO) films on SrTiO3 (STO), (LaAlO3)0.3(Sr2AlTaO6)0.7 (LSAT) and NdGaO3 (NGO) substrates by pulsed laser deposition, and systematically studied their transport properties. All samples showed insulating behavior, but the resistivity of CLIO/NGO film showed relatively weak temperature dependence and can be regarded as a poor metallic behavior. The carrier transport in all the samples were dominated by the Mott-type variable range hopping. The magnetoresistance of CLIO/NGO showed a value about 6%, larger than that of CLIO/STO and CLIO/LSAT, while the CLIO/STO sample showed very large magnetic moment and small coercive field. These findings indicate that mechanical strain can be a useful route to explore the unusual physics of iridates with strong spin-orbit coupling.

AB - We fabricated high-quality epitaxial Ca0.8La0.2IrO3 (CLIO) films on SrTiO3 (STO), (LaAlO3)0.3(Sr2AlTaO6)0.7 (LSAT) and NdGaO3 (NGO) substrates by pulsed laser deposition, and systematically studied their transport properties. All samples showed insulating behavior, but the resistivity of CLIO/NGO film showed relatively weak temperature dependence and can be regarded as a poor metallic behavior. The carrier transport in all the samples were dominated by the Mott-type variable range hopping. The magnetoresistance of CLIO/NGO showed a value about 6%, larger than that of CLIO/STO and CLIO/LSAT, while the CLIO/STO sample showed very large magnetic moment and small coercive field. These findings indicate that mechanical strain can be a useful route to explore the unusual physics of iridates with strong spin-orbit coupling.

KW - Epitaxial thin films

KW - Iridates

KW - Magnetoresistance

KW - Spin-orbital coupling

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JO - Materials Letters

JF - Materials Letters

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