Atomic-scale analysis of interfaces in an all-oxide magnetic tunnel junction

J. L. Maurice; F. Pailloux; D. Imhoff; N. Bonnet; L. Samet; A. Barthelemy; J. P. Contour; C. Colliex; A. Fert

doi:10.1051/epjap:2003071

Atomic-scale analysis of interfaces in an all-oxide magnetic tunnel junction

J. L. Maurice
, F. Pailloux
, D. Imhoff
, N. Bonnet
, L. Samet
, A. Barthelemy
, J. P. Contour
, C. Colliex
, A. Fert

Centre national de la recherche scientifique
Lab. de Métallurgie Physique
Univ. Poitiers
Laboratoire de Physique des Solides
Univ. de Reims Champagne Ardenne

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

7 Citations (Scopus)

Abstract

We use High Resolution Electron Microscopy (HRTEM) together with Electron Energy Loss Spectroscopy (EELS) to analyze the crystallography and the chemical configuration of interfaces in a state-of-the-art La_2/3Sr_1/3MnO₃/SrTiO₃/ La_2/3Sr_1/3MnO₃ tunnel junction. EELS indicates that manganese ions keep their bulk valency up to the last atomic plane in contact with the insulator. Tunnel magnetoresistance however decreases with temperature faster than magnetisation in these samples. Quantitative HRTEM reveals some local departures from chemical abruptness at the interfaces, which could play a role in this decrease.

Original language	English
Pages (from-to)	215-221
Number of pages	7
Journal	EPJ Applied Physics
Volume	24
Issue number	3
DOIs	https://doi.org/10.1051/epjap:2003071
Publication status	Published - 1 Jan 2003

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title = "Atomic-scale analysis of interfaces in an all-oxide magnetic tunnel junction",

abstract = "We use High Resolution Electron Microscopy (HRTEM) together with Electron Energy Loss Spectroscopy (EELS) to analyze the crystallography and the chemical configuration of interfaces in a state-of-the-art La2/3Sr1/3MnO3/SrTiO3/ La2/3Sr1/3MnO3 tunnel junction. EELS indicates that manganese ions keep their bulk valency up to the last atomic plane in contact with the insulator. Tunnel magnetoresistance however decreases with temperature faster than magnetisation in these samples. Quantitative HRTEM reveals some local departures from chemical abruptness at the interfaces, which could play a role in this decrease.",

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T1 - Atomic-scale analysis of interfaces in an all-oxide magnetic tunnel junction

AU - Maurice, J. L.

AU - Pailloux, F.

AU - Imhoff, D.

AU - Bonnet, N.

AU - Samet, L.

AU - Barthelemy, A.

AU - Contour, J. P.

AU - Colliex, C.

AU - Fert, A.

PY - 2003/1/1

Y1 - 2003/1/1

N2 - We use High Resolution Electron Microscopy (HRTEM) together with Electron Energy Loss Spectroscopy (EELS) to analyze the crystallography and the chemical configuration of interfaces in a state-of-the-art La2/3Sr1/3MnO3/SrTiO3/ La2/3Sr1/3MnO3 tunnel junction. EELS indicates that manganese ions keep their bulk valency up to the last atomic plane in contact with the insulator. Tunnel magnetoresistance however decreases with temperature faster than magnetisation in these samples. Quantitative HRTEM reveals some local departures from chemical abruptness at the interfaces, which could play a role in this decrease.

AB - We use High Resolution Electron Microscopy (HRTEM) together with Electron Energy Loss Spectroscopy (EELS) to analyze the crystallography and the chemical configuration of interfaces in a state-of-the-art La2/3Sr1/3MnO3/SrTiO3/ La2/3Sr1/3MnO3 tunnel junction. EELS indicates that manganese ions keep their bulk valency up to the last atomic plane in contact with the insulator. Tunnel magnetoresistance however decreases with temperature faster than magnetisation in these samples. Quantitative HRTEM reveals some local departures from chemical abruptness at the interfaces, which could play a role in this decrease.

U2 - 10.1051/epjap:2003071

DO - 10.1051/epjap:2003071

M3 - Article

AN - SCOPUS:0348252135

SN - 1286-0042

VL - 24

SP - 215

EP - 221

JO - EPJ Applied Physics

JF - EPJ Applied Physics

IS - 3

ER -

Atomic-scale analysis of interfaces in an all-oxide magnetic tunnel junction

Abstract

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