Chemically driven nanoscopic magnetic phase separation at the SrTiO 3(001)/La1-xSrxCoO3 interface

Maria A. Torija; Manish Sharma; Jaume Gazquez; Maria Varela; Chunyong He; Josh Schmitt; Julie A. Borchers; Mark Laver; Sami El-Khatib; Chris Leighton

doi:10.1002/adma.201100417

Chemically driven nanoscopic magnetic phase separation at the SrTiO ₃(001)/La_1-xSr_xCoO₃ interface

Maria A. Torija, Manish Sharma, Jaume Gazquez, Maria Varela, Chunyong He, Josh Schmitt, Julie A. Borchers, Mark Laver, Sami El-Khatib, Chris Leighton

Chemical Engineering and Materials Science

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

66 Scopus citations

Abstract

The degradation in magnetic properties in very thin film complex oxides is studied using SrTiO₃(001)/La_1-xSr_xCoO ₃, providing unequivocal evidence for nanoscopic interfacial magnetic phase separation. Electron microscopy and spectroscopy reveal that this occurs due to inhomogeneity in local hole doping, driven by subtle, depthwise variations in the Sr and O stoichiometry. Simple thermodynamic and structural arguments for the origin of these variations are provided.

Original language	English (US)
Pages (from-to)	2711-2715
Number of pages	5
Journal	Advanced Materials
Volume	23
Issue number	24
DOIs	https://doi.org/10.1002/adma.201100417
State	Published - Jun 24 2011

Keywords

complex oxides
magnetism
thin films

Publisher link

10.1002/adma.201100417

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title = "Chemically driven nanoscopic magnetic phase separation at the SrTiO 3(001)/La1-xSrxCoO3 interface",

abstract = "The degradation in magnetic properties in very thin film complex oxides is studied using SrTiO3(001)/La1-xSrxCoO 3, providing unequivocal evidence for nanoscopic interfacial magnetic phase separation. Electron microscopy and spectroscopy reveal that this occurs due to inhomogeneity in local hole doping, driven by subtle, depthwise variations in the Sr and O stoichiometry. Simple thermodynamic and structural arguments for the origin of these variations are provided.",

keywords = "complex oxides, magnetism, thin films",

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AU - Torija, Maria A.

AU - Sharma, Manish

AU - Gazquez, Jaume

AU - Varela, Maria

AU - He, Chunyong

AU - Schmitt, Josh

AU - Borchers, Julie A.

AU - Laver, Mark

AU - El-Khatib, Sami

AU - Leighton, Chris

PY - 2011/6/24

Y1 - 2011/6/24

N2 - The degradation in magnetic properties in very thin film complex oxides is studied using SrTiO3(001)/La1-xSrxCoO 3, providing unequivocal evidence for nanoscopic interfacial magnetic phase separation. Electron microscopy and spectroscopy reveal that this occurs due to inhomogeneity in local hole doping, driven by subtle, depthwise variations in the Sr and O stoichiometry. Simple thermodynamic and structural arguments for the origin of these variations are provided.

AB - The degradation in magnetic properties in very thin film complex oxides is studied using SrTiO3(001)/La1-xSrxCoO 3, providing unequivocal evidence for nanoscopic interfacial magnetic phase separation. Electron microscopy and spectroscopy reveal that this occurs due to inhomogeneity in local hole doping, driven by subtle, depthwise variations in the Sr and O stoichiometry. Simple thermodynamic and structural arguments for the origin of these variations are provided.

KW - complex oxides

KW - magnetism

KW - thin films

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