Nanoscale analysis of a SrTiO3/La2/3Sr1/3MnO3 interface

F. Pailloux; D. Imhoff; T. Sikora; A. Barthélémy; J. L. Maurice; J. P. Contour; C. Colliex; A. Fert

doi:10.1103/PhysRevB.66.014417

Nanoscale analysis of a SrTiO₃/La_2/3Sr_1/3MnO₃ interface

F. Pailloux
, D. Imhoff
, T. Sikora
, A. Barthélémy
, J. L. Maurice
, J. P. Contour
, C. Colliex
, A. Fert

Centre national de la recherche scientifique
Université Paris-Saclay
Laboratoire de Physique des Solides
Laboratoire Aimé Cotton

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

70 Citations (Scopus)

Abstract

The aim of the present work is an atomic scale characterization of the SrTiO₃/La_2/3Sr_1/3MnO₃ interface involved in Co/SrTiO₃/La_2/3Sr_1/3MnO₃ tunnel junctions. Our high-resolution transmission electron microscopy experiments show the quality of the pseudo-morphic growth of La_2/3Sr_1/3MnO₃ (LSMO) and SrTiO₃ (STO), but do not allow us to determine the termination of LSMO. On the other hand, we have carried out an energy-loss near-edge structure study of the Mn_2p and O_1s edges. The main result is that the valence of Mn keeps its intrinsic value of the bulk material till the last MnO₂ layers at the interface, which is consistent with the observation of magnetoresistance up to practically the Curie temperature of bulk LSMO in our junctions. These results suggest a La_2/3Sr_1/3O termination of LSMO.

Original language	English
Article number	014417
Pages (from-to)	144171-144179
Number of pages	9
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	66
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevB.66.014417
Publication status	Published - 1 Jul 2002

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title = "Nanoscale analysis of a SrTiO3/La2/3Sr1/3MnO3 interface",

abstract = "The aim of the present work is an atomic scale characterization of the SrTiO3/La2/3Sr1/3MnO3 interface involved in Co/SrTiO3/La2/3Sr1/3MnO3 tunnel junctions. Our high-resolution transmission electron microscopy experiments show the quality of the pseudo-morphic growth of La2/3Sr1/3MnO3 (LSMO) and SrTiO3 (STO), but do not allow us to determine the termination of LSMO. On the other hand, we have carried out an energy-loss near-edge structure study of the Mn2p and O1s edges. The main result is that the valence of Mn keeps its intrinsic value of the bulk material till the last MnO2 layers at the interface, which is consistent with the observation of magnetoresistance up to practically the Curie temperature of bulk LSMO in our junctions. These results suggest a La2/3Sr1/3O termination of LSMO.",

author = "F. Pailloux and D. Imhoff and T. Sikora and A. Barth{\'e}l{\'e}my and Maurice, \{J. L.\} and Contour, \{J. P.\} and C. Colliex and A. Fert",

year = "2002",

month = jul,

day = "1",

doi = "10.1103/PhysRevB.66.014417",

language = "English",

volume = "66",

pages = "144171--144179",

journal = "Physical Review B - Condensed Matter and Materials Physics",

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TY - JOUR

T1 - Nanoscale analysis of a SrTiO3/La2/3Sr1/3MnO3 interface

AU - Pailloux, F.

AU - Imhoff, D.

AU - Sikora, T.

AU - Barthélémy, A.

AU - Maurice, J. L.

AU - Contour, J. P.

AU - Colliex, C.

AU - Fert, A.

PY - 2002/7/1

Y1 - 2002/7/1

N2 - The aim of the present work is an atomic scale characterization of the SrTiO3/La2/3Sr1/3MnO3 interface involved in Co/SrTiO3/La2/3Sr1/3MnO3 tunnel junctions. Our high-resolution transmission electron microscopy experiments show the quality of the pseudo-morphic growth of La2/3Sr1/3MnO3 (LSMO) and SrTiO3 (STO), but do not allow us to determine the termination of LSMO. On the other hand, we have carried out an energy-loss near-edge structure study of the Mn2p and O1s edges. The main result is that the valence of Mn keeps its intrinsic value of the bulk material till the last MnO2 layers at the interface, which is consistent with the observation of magnetoresistance up to practically the Curie temperature of bulk LSMO in our junctions. These results suggest a La2/3Sr1/3O termination of LSMO.

AB - The aim of the present work is an atomic scale characterization of the SrTiO3/La2/3Sr1/3MnO3 interface involved in Co/SrTiO3/La2/3Sr1/3MnO3 tunnel junctions. Our high-resolution transmission electron microscopy experiments show the quality of the pseudo-morphic growth of La2/3Sr1/3MnO3 (LSMO) and SrTiO3 (STO), but do not allow us to determine the termination of LSMO. On the other hand, we have carried out an energy-loss near-edge structure study of the Mn2p and O1s edges. The main result is that the valence of Mn keeps its intrinsic value of the bulk material till the last MnO2 layers at the interface, which is consistent with the observation of magnetoresistance up to practically the Curie temperature of bulk LSMO in our junctions. These results suggest a La2/3Sr1/3O termination of LSMO.

U2 - 10.1103/PhysRevB.66.014417

DO - 10.1103/PhysRevB.66.014417

M3 - Article

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SN - 0163-1829

VL - 66

SP - 144171

EP - 144179

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 1

M1 - 014417

ER -

Nanoscale analysis of a SrTiO3/La2/3Sr1/3MnO3 interface

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Nanoscale analysis of a SrTiO₃/La_2/3Sr_1/3MnO₃ interface