Heterostructures of La0.67Sr0.33MnO3/SrTiO3/La0.67Sr0.33MnO3 grown by pulsed laser deposition on (001) SrTiO3

R. Lyonnet; J. L. Maurice; M. J. Hÿtch; D. Michel; J. P. Contour

doi:10.1016/S0169-4332(00)00199-9

Heterostructures of La_0.67Sr_0.33MnO₃/SrTiO₃/La_0.67Sr_0.33MnO₃ grown by pulsed laser deposition on (001) SrTiO₃

R. Lyonnet
, J. L. Maurice
, M. J. Hÿtch
, D. Michel
, J. P. Contour

Thales Group
Centre d'Etudes de Chimie Métallurgique

Résultats de recherche: Contribution à un journal › Article de conférence › Revue par des pairs

Résumé

We have prepared by pulsed laser deposition La_0.67Sr_0.33MnO₃ (LSMO)/SrTiO₃ (STO)/LSMO tunnel junctions epitaxially grown on (001) STO. LSMO is rhombohedral in bulk (pseudo cubic with an angle of 89.74°); its epitaxy on STO raises two kinds of questions: (1) are the interfaces chemically abrupt? (2) How is the geometrical mismatch (rhombohedron on cube) accommodated? We have investigated these issues using cross-sectional high-resolution transmission electron microscopy (HRTEM). We have shown previously that interdiffusion was absent, and that interfacial roughness was restricted to single unit cell steps. Here, we present our results on atomic plane distortion measurements using quantitative Fourier analysis of the HRTEM micrographs. We show that a progressive twinning occurs that gives a full rhombohedral relaxation at a thickness of about 30 nm, with no need of dislocations.

langue originale	Anglais
Pages (de - à)	245-249
Nombre de pages	5
journal	Applied Surface Science
Volume	162
Les DOIs	https://doi.org/10.1016/S0169-4332(00)00199-9
état	Publié - 1 août 2000
Modification externe	Oui
Evénement	5th International Symposium on Atomically Controlled Surfaces, Interfaces and Nanostructures (ACSIN-5) - Provence, France Durée: 6 juil. 1999 → 9 juil. 1999

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10.1016/S0169-4332(00)00199-9

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@article{eb6c548b969f482990e432753db5634e,

title = "Heterostructures of La0.67Sr0.33MnO3/SrTiO3/La0.67Sr0.33MnO3 grown by pulsed laser deposition on (001) SrTiO3",

abstract = "We have prepared by pulsed laser deposition La0.67Sr0.33MnO3 (LSMO)/SrTiO3 (STO)/LSMO tunnel junctions epitaxially grown on (001) STO. LSMO is rhombohedral in bulk (pseudo cubic with an angle of 89.74°); its epitaxy on STO raises two kinds of questions: (1) are the interfaces chemically abrupt? (2) How is the geometrical mismatch (rhombohedron on cube) accommodated? We have investigated these issues using cross-sectional high-resolution transmission electron microscopy (HRTEM). We have shown previously that interdiffusion was absent, and that interfacial roughness was restricted to single unit cell steps. Here, we present our results on atomic plane distortion measurements using quantitative Fourier analysis of the HRTEM micrographs. We show that a progressive twinning occurs that gives a full rhombohedral relaxation at a thickness of about 30 nm, with no need of dislocations.",

author = "R. Lyonnet and Maurice, \{J. L.\} and H{\"y}tch, \{M. J.\} and D. Michel and Contour, \{J. P.\}",

year = "2000",

month = aug,

day = "1",

doi = "10.1016/S0169-4332(00)00199-9",

language = "English",

volume = "162",

pages = "245--249",

journal = "Applied Surface Science",

issn = "0169-4332",

note = "5th International Symposium on Atomically Controlled Surfaces, Interfaces and Nanostructures (ACSIN-5) ; Conference date: 06-07-1999 Through 09-07-1999",

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TY - JOUR

T1 - Heterostructures of La0.67Sr0.33MnO3/SrTiO3/La0.67Sr0.33MnO3 grown by pulsed laser deposition on (001) SrTiO3

AU - Lyonnet, R.

AU - Maurice, J. L.

AU - Hÿtch, M. J.

AU - Michel, D.

AU - Contour, J. P.

PY - 2000/8/1

Y1 - 2000/8/1

N2 - We have prepared by pulsed laser deposition La0.67Sr0.33MnO3 (LSMO)/SrTiO3 (STO)/LSMO tunnel junctions epitaxially grown on (001) STO. LSMO is rhombohedral in bulk (pseudo cubic with an angle of 89.74°); its epitaxy on STO raises two kinds of questions: (1) are the interfaces chemically abrupt? (2) How is the geometrical mismatch (rhombohedron on cube) accommodated? We have investigated these issues using cross-sectional high-resolution transmission electron microscopy (HRTEM). We have shown previously that interdiffusion was absent, and that interfacial roughness was restricted to single unit cell steps. Here, we present our results on atomic plane distortion measurements using quantitative Fourier analysis of the HRTEM micrographs. We show that a progressive twinning occurs that gives a full rhombohedral relaxation at a thickness of about 30 nm, with no need of dislocations.

AB - We have prepared by pulsed laser deposition La0.67Sr0.33MnO3 (LSMO)/SrTiO3 (STO)/LSMO tunnel junctions epitaxially grown on (001) STO. LSMO is rhombohedral in bulk (pseudo cubic with an angle of 89.74°); its epitaxy on STO raises two kinds of questions: (1) are the interfaces chemically abrupt? (2) How is the geometrical mismatch (rhombohedron on cube) accommodated? We have investigated these issues using cross-sectional high-resolution transmission electron microscopy (HRTEM). We have shown previously that interdiffusion was absent, and that interfacial roughness was restricted to single unit cell steps. Here, we present our results on atomic plane distortion measurements using quantitative Fourier analysis of the HRTEM micrographs. We show that a progressive twinning occurs that gives a full rhombohedral relaxation at a thickness of about 30 nm, with no need of dislocations.

UR - https://www.scopus.com/pages/publications/0034246443

U2 - 10.1016/S0169-4332(00)00199-9

DO - 10.1016/S0169-4332(00)00199-9

M3 - Conference article

AN - SCOPUS:0034246443

SN - 0169-4332

VL - 162

SP - 245

EP - 249

JO - Applied Surface Science

JF - Applied Surface Science

T2 - 5th International Symposium on Atomically Controlled Surfaces, Interfaces and Nanostructures (ACSIN-5)

Y2 - 6 July 1999 through 9 July 1999