Structural, magnetic and transport properties of fully epitaxial LaMnO3/LaAlO3multilayers

Y. K. Liu; H. F. Wong; S. Z. Huang; S. X. Hu; S. M. Ng; K. K. Lam; C. L. Mak; Chi Wah Leung

doi:10.1016/j.matlet.2017.06.097

Structural, magnetic and transport properties of fully epitaxial LaMnO₃/LaAlO₃multilayers

Y. K. Liu, H. F. Wong, S. Z. Huang, S. X. Hu, S. M. Ng, K. K. Lam, C. L. Mak, Chi Wah Leung

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

3 Citations (Scopus)

Abstract

The structural, magnetic and transport properties of LaMnO3/LaAlO3(2 unit cells) (LMO/LAO) multilayers with different thicknesses of LMO layer grown on SrTiO3substrates were studied. Structural investigations confirmed that all the samples were fully epitaxial and the out-of-plane lattice constant increased with rising LMO layer thickness t from 1 to 4 unit cells. Ferromagnetic behavior could be observed only when t was above 2 unit cells, while the coercive field reduced with increasing t. Transport measurements indicated that all the multilayers were insulating and the activation energy of the multilayers were much larger than single-layered LMO films. These results provide a promising route for tuning the structure, electronic and magnetic properties in other strong-correlated materials.

Original language	English
Pages (from-to)	230-232
Number of pages	3
Journal	Materials Letters
Volume	205
DOIs	https://doi.org/10.1016/j.matlet.2017.06.097
Publication status	Published - 15 Oct 2017

Keywords

Epitaxial growth
Magnetic properties
Manganites
Multilayer structure

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

More information

10.1016/j.matlet.2017.06.097

http://hdl.handle.net/10397/100384

Cite this

@article{ec48ba65ef644fbda638af5f53e395be,

title = "Structural, magnetic and transport properties of fully epitaxial LaMnO3/LaAlO3multilayers",

abstract = "The structural, magnetic and transport properties of LaMnO3/LaAlO3(2 unit cells) (LMO/LAO) multilayers with different thicknesses of LMO layer grown on SrTiO3substrates were studied. Structural investigations confirmed that all the samples were fully epitaxial and the out-of-plane lattice constant increased with rising LMO layer thickness t from 1 to 4 unit cells. Ferromagnetic behavior could be observed only when t was above 2 unit cells, while the coercive field reduced with increasing t. Transport measurements indicated that all the multilayers were insulating and the activation energy of the multilayers were much larger than single-layered LMO films. These results provide a promising route for tuning the structure, electronic and magnetic properties in other strong-correlated materials.",

keywords = "Epitaxial growth, Magnetic properties, Manganites, Multilayer structure",

author = "Liu, {Y. K.} and Wong, {H. F.} and Huang, {S. Z.} and Hu, {S. X.} and Ng, {S. M.} and Lam, {K. K.} and Mak, {C. L.} and Leung, {Chi Wah}",

year = "2017",

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doi = "10.1016/j.matlet.2017.06.097",

language = "English",

volume = "205",

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journal = "Materials Letters",

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TY - JOUR

T1 - Structural, magnetic and transport properties of fully epitaxial LaMnO3/LaAlO3multilayers

AU - Liu, Y. K.

AU - Wong, H. F.

AU - Huang, S. Z.

AU - Hu, S. X.

AU - Ng, S. M.

AU - Lam, K. K.

AU - Mak, C. L.

AU - Leung, Chi Wah

PY - 2017/10/15

Y1 - 2017/10/15

N2 - The structural, magnetic and transport properties of LaMnO3/LaAlO3(2 unit cells) (LMO/LAO) multilayers with different thicknesses of LMO layer grown on SrTiO3substrates were studied. Structural investigations confirmed that all the samples were fully epitaxial and the out-of-plane lattice constant increased with rising LMO layer thickness t from 1 to 4 unit cells. Ferromagnetic behavior could be observed only when t was above 2 unit cells, while the coercive field reduced with increasing t. Transport measurements indicated that all the multilayers were insulating and the activation energy of the multilayers were much larger than single-layered LMO films. These results provide a promising route for tuning the structure, electronic and magnetic properties in other strong-correlated materials.

AB - The structural, magnetic and transport properties of LaMnO3/LaAlO3(2 unit cells) (LMO/LAO) multilayers with different thicknesses of LMO layer grown on SrTiO3substrates were studied. Structural investigations confirmed that all the samples were fully epitaxial and the out-of-plane lattice constant increased with rising LMO layer thickness t from 1 to 4 unit cells. Ferromagnetic behavior could be observed only when t was above 2 unit cells, while the coercive field reduced with increasing t. Transport measurements indicated that all the multilayers were insulating and the activation energy of the multilayers were much larger than single-layered LMO films. These results provide a promising route for tuning the structure, electronic and magnetic properties in other strong-correlated materials.

KW - Epitaxial growth

KW - Magnetic properties

KW - Manganites

KW - Multilayer structure

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DO - 10.1016/j.matlet.2017.06.097

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EP - 232

JO - Materials Letters

JF - Materials Letters

ER -