Title :

Cationic and charge segregation in La2/3Ca1/3MnO3 thin films grown on (001) and (110) SrTiO3

Author(s) :

Estradé, S. [Auteur]
Universitat de Barcelona [UB]
Arbiol, J. [Auteur]
Universitat de Barcelona [UB]
Peiró, F. [Auteur]
Universitat de Barcelona [UB]
Infante, I. C. [Auteur]
Institut de Ciència de Materials de Barcelona [ICMAB]
Sánchez, F. [Auteur]
Institut de Ciència de Materials de Barcelona [ICMAB]
Fontcuberta, J. [Auteur]
Institut de Ciència de Materials de Barcelona [ICMAB]
de la Peña, Francisco [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Walls, M. [Auteur]
Colliex, C. [Auteur]

Journal title :

Applied Physics Letters

Volume number :

93

Publisher :

AIP Publishing

Publication date :

2008-09-15

ISSN :

0003-6951

HAL domain(s) :

Chimie/Matériaux
Physique [physics]/Matière Condensée [cond-mat]/Science des matériaux [cond-mat.mtrl-sci]
Physique [physics]/Physique [physics]/Géophysique [physics.geo-ph]
Physique [physics]/Astrophysique [astro-ph]
Planète et Univers [physics]/Astrophysique [astro-ph]
Planète et Univers [physics]/Sciences de la Terre

English abstract : [en]

Electron energy-loss spectroscopy is used to map composition and electronic states in epitaxial La2/3Ca1/3MnO3 films grown on SrTiO3 (001) and (110) substrates. It is found that in partially relaxed (110) films cationic ...
Show more >Electron energy-loss spectroscopy is used to map composition and electronic states in epitaxial La2/3Ca1/3MnO3 films grown on SrTiO3 (001) and (110) substrates. It is found that in partially relaxed (110) films cationic composition and valence state of Mn3+/4+ ions are preserved across the film thickness. In contrast, in fully strained (001) films, the Ca/La ratio gradually changes across the film, being La rich at film/substrate interface and La depleted at free surface; Mn valence state changes accordingly. These observations suggest that a strongly orientation-dependent adaptative composition mechanism dominates stress accommodation in manganite films and provides microscopic understanding of their dissimilar magnetic properties.Show less >

Language :

Anglais

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

Université de Lille
CNRS
INRAE
ENSCL

Collections :

• Unité Matériaux et Transformations (UMET) - UMR 8207

Research team(s) :

Matériaux Terrestres et Planétaires

Submission date :

2024-02-01T14:12:49Z
2024-02-02T09:15:27Z