Structurally induced magnetization in a La 2/3Sr 4/3MnO 4 superlattice

Amish B. Shah; Brittany B. Nelson-Cheeseman; Ganesh Subramanian; Anand Bhattacharya; John Spence

doi:10.1002/pssa.201127728

Structurally induced magnetization in a La _2/3Sr _4/3MnO ₄ superlattice

Amish B. Shah, Brittany B. Nelson-Cheeseman, Ganesh Subramanian, Anand Bhattacharya, John Spence

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

Abstract

A structural transition has been observed in a digital superlattice of La _2/3Sr _4/3MnO ₄, which is correlated to a magnetization enhancement upon cooling the sample. These artificial superlattices were grown layer-by-layer using ozone-assisted molecular beam epitaxy (MBE). Electron diffraction experiments show a phase transition below 150 K in nanopatches of the superlattice, which coincides with an enhanced magnetization starting below 110 K. Atomic scale electron energy loss spectroscopy (EELS) also shows changes in the Mn L _2,3 and O K edges, which are related to valence, strain, and the atomic coordination within nanopatches. Atomic resolution image and EELS showing variations of oxygen and lanthanum signature edges in a La _2/3Sr _4/3MnO ₄ supperlattice.

Original language	English (US)
Pages (from-to)	1322-1327
Number of pages	6
Journal	Physica Status Solidi (A) Applications and Materials Science
Volume	209
Issue number	7
DOIs	https://doi.org/10.1002/pssa.201127728
State	Published - Jul 2012

Keywords

EELS
Ruddleson-Popper
magnetic phase transitions
oxide superlattices

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Surfaces and Interfaces
Surfaces, Coatings and Films
Electrical and Electronic Engineering
Materials Chemistry

Access to Document

10.1002/pssa.201127728

Cite this

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abstract = "A structural transition has been observed in a digital superlattice of La 2/3Sr 4/3MnO 4, which is correlated to a magnetization enhancement upon cooling the sample. These artificial superlattices were grown layer-by-layer using ozone-assisted molecular beam epitaxy (MBE). Electron diffraction experiments show a phase transition below 150 K in nanopatches of the superlattice, which coincides with an enhanced magnetization starting below 110 K. Atomic scale electron energy loss spectroscopy (EELS) also shows changes in the Mn L 2,3 and O K edges, which are related to valence, strain, and the atomic coordination within nanopatches. Atomic resolution image and EELS showing variations of oxygen and lanthanum signature edges in a La 2/3Sr 4/3MnO 4 supperlattice.",

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AU - Nelson-Cheeseman, Brittany B.

AU - Subramanian, Ganesh

AU - Bhattacharya, Anand

AU - Spence, John

PY - 2012/7

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KW - oxide superlattices

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