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Title: Engineered superlattices with crossover from decoupled to synthetic ferromagnetic behavior

Abstract

The extent of interfacial charge transfer and the resulting impact on magnetic interactions were investigated as a function of sublayer thickness in La 0.7Sr 0.3MnO 3/La 0.7Sr 0.3CoO 3 ferromagnetic superlattices. Element-specific soft x-ray magnetic spectroscopy reveals that the electronic structure is altered within 5–6 unit cells of the chemical interface, and can lead to a synthetic ferromagnet with strong magnetic coupling between the sublayers. The saturation magnetization and coercivity depends sensitively on the sublayer thickness due to the length scale of this interfacial effect. For larger sublayer thicknesses, the La 0.7Sr 0.3MnO 3 and La 0.7Sr 0.3CoO 3 sublayers are magnetically decoupled, displaying two independent magnetic transitions with little sublayer thickness dependence. Lastly, these results demonstrate how interfacial phenomena at perovskite oxide interfaces can be used to tailor their functional properties at the atomic scale.

Authors:
ORCiD logo [1];  [1];  [1];  [2];  [3]; ORCiD logo [1]
  1. Univ. of California, Davis, CA (United States)
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1432244
Grant/Contract Number:
AC02-05CH11231; AC02-76SF00515
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Physics. Condensed Matter
Additional Journal Information:
Journal Volume: 30; Journal Issue: 1; Related Information: © 2017 IOP Publishing Ltd.; Journal ID: ISSN 0953-8984
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; superlattices; magnetic oxides; soft x-ray magnetic spectroscopy; interfaces

Citation Formats

Chopdekar, Rajesh V., Malik, Vivek K., Kane, Alexander M., Mehta, Apurva, Arenholz, Elke, and Takamura, Yayoi. Engineered superlattices with crossover from decoupled to synthetic ferromagnetic behavior. United States: N. p., 2017. Web. doi:10.1088/1361-648X/aa9b13.
Chopdekar, Rajesh V., Malik, Vivek K., Kane, Alexander M., Mehta, Apurva, Arenholz, Elke, & Takamura, Yayoi. Engineered superlattices with crossover from decoupled to synthetic ferromagnetic behavior. United States. doi:10.1088/1361-648X/aa9b13.
Chopdekar, Rajesh V., Malik, Vivek K., Kane, Alexander M., Mehta, Apurva, Arenholz, Elke, and Takamura, Yayoi. Mon . "Engineered superlattices with crossover from decoupled to synthetic ferromagnetic behavior". United States. doi:10.1088/1361-648X/aa9b13.
@article{osti_1432244,
title = {Engineered superlattices with crossover from decoupled to synthetic ferromagnetic behavior},
author = {Chopdekar, Rajesh V. and Malik, Vivek K. and Kane, Alexander M. and Mehta, Apurva and Arenholz, Elke and Takamura, Yayoi},
abstractNote = {The extent of interfacial charge transfer and the resulting impact on magnetic interactions were investigated as a function of sublayer thickness in La0.7Sr0.3MnO3/La0.7Sr0.3CoO3 ferromagnetic superlattices. Element-specific soft x-ray magnetic spectroscopy reveals that the electronic structure is altered within 5–6 unit cells of the chemical interface, and can lead to a synthetic ferromagnet with strong magnetic coupling between the sublayers. The saturation magnetization and coercivity depends sensitively on the sublayer thickness due to the length scale of this interfacial effect. For larger sublayer thicknesses, the La0.7Sr0.3MnO3 and La0.7Sr0.3CoO3 sublayers are magnetically decoupled, displaying two independent magnetic transitions with little sublayer thickness dependence. Lastly, these results demonstrate how interfacial phenomena at perovskite oxide interfaces can be used to tailor their functional properties at the atomic scale.},
doi = {10.1088/1361-648X/aa9b13},
journal = {Journal of Physics. Condensed Matter},
number = 1,
volume = 30,
place = {United States},
year = {Mon Dec 04 00:00:00 EST 2017},
month = {Mon Dec 04 00:00:00 EST 2017}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on December 4, 2018
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