Surface segregation and restructuring of colossal-magnetoresistant manganese perovskites La0.65Sr0.35MnO3

Hani Dulli; P. A. Dowben; S. H. Liou; E. W. Plummer

doi:10.1103/PhysRevB.62.R14629

Surface segregation and restructuring of colossal-magnetoresistant manganese perovskites La_0.65Sr_0.35MnO₃

Hani Dulli, P. A. Dowben, S. H. Liou, E. W. Plummer

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184 Scopus citations

Abstract

We have investigated the surface chemical composition of crystalline films of La_0.65Sr_0.35MnO₃ by angleresolved x-ray photoelectron spectroscopy. The surface composition was found to be significantly different from that of the bulk because of an appreciable Sr segregation. Furthermore, our study suggests that this Sr segregation has caused a major restructuring of the surface region characterized by the formation of a Ruddlesden-Popper phase (La,Sr)_n+1 Mn_nO_3n+1 with n=1. Segregation and restructuring in the surface region should be common in these doped perovskites and will have a profound impact on the electronic and magnetic properties of ultrathin films and magnetic tunneling junctions made of these materials.

Original language	English (US)
Article number	R14629
Pages (from-to)	R14629-R14632
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	62
Issue number	22
DOIs	https://doi.org/10.1103/PhysRevB.62.R14629
State	Published - Dec 1 2000

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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title = "Surface segregation and restructuring of colossal-magnetoresistant manganese perovskites La0.65Sr0.35MnO3",

abstract = "We have investigated the surface chemical composition of crystalline films of La0.65Sr0.35MnO3 by angleresolved x-ray photoelectron spectroscopy. The surface composition was found to be significantly different from that of the bulk because of an appreciable Sr segregation. Furthermore, our study suggests that this Sr segregation has caused a major restructuring of the surface region characterized by the formation of a Ruddlesden-Popper phase (La,Sr)n+1 MnnO3n+1 with n=1. Segregation and restructuring in the surface region should be common in these doped perovskites and will have a profound impact on the electronic and magnetic properties of ultrathin films and magnetic tunneling junctions made of these materials.",

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T1 - Surface segregation and restructuring of colossal-magnetoresistant manganese perovskites La0.65Sr0.35MnO3

AU - Dulli, Hani

AU - Dowben, P. A.

AU - Liou, S. H.

AU - Plummer, E. W.

PY - 2000/12/1

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N2 - We have investigated the surface chemical composition of crystalline films of La0.65Sr0.35MnO3 by angleresolved x-ray photoelectron spectroscopy. The surface composition was found to be significantly different from that of the bulk because of an appreciable Sr segregation. Furthermore, our study suggests that this Sr segregation has caused a major restructuring of the surface region characterized by the formation of a Ruddlesden-Popper phase (La,Sr)n+1 MnnO3n+1 with n=1. Segregation and restructuring in the surface region should be common in these doped perovskites and will have a profound impact on the electronic and magnetic properties of ultrathin films and magnetic tunneling junctions made of these materials.

AB - We have investigated the surface chemical composition of crystalline films of La0.65Sr0.35MnO3 by angleresolved x-ray photoelectron spectroscopy. The surface composition was found to be significantly different from that of the bulk because of an appreciable Sr segregation. Furthermore, our study suggests that this Sr segregation has caused a major restructuring of the surface region characterized by the formation of a Ruddlesden-Popper phase (La,Sr)n+1 MnnO3n+1 with n=1. Segregation and restructuring in the surface region should be common in these doped perovskites and will have a profound impact on the electronic and magnetic properties of ultrathin films and magnetic tunneling junctions made of these materials.

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Surface segregation and restructuring of colossal-magnetoresistant manganese perovskites La_0.65Sr_0.35MnO₃

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