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Title: Oscillatory Noncollinear Magnetism Induced by Interfacial Charge Transfer in Superlattices Composed of Metallic Oxides

Abstract

Interfaces between correlated complex oxides are promising avenues to realize new forms of magnetism that arise as a result of charge transfer, proximity effects, and locally broken symmetries. We report on the discovery of a noncollinear magnetic structure in superlattices of the ferromagnetic metallic oxide La2/3Sr1/3MnO3 (LSMO) and the correlated metal LaNiO3 (LNO). The exchange interaction between LSMO layers is mediated by the intervening LNO, such that the angle between the magnetization of neighboring LSMO layers varies in an oscillatory manner with the thickness of the LNO layer. The magnetic field, temperature, and spacer thickness dependence of the noncollinear structure are inconsistent with the bilinear and biquadratic interactions that are used to model the magnetic structure in conventional metallic multilayers. A model that couples the LSMO layers to a helical spin state within the LNO fits the observed behavior. We propose that the spin-helix results from the interaction between a spatially varying spin susceptibility within the LNO and interfacial charge transfer that creates localized Ni2+ states. In conclusion, our work suggests a new approach to engineering noncollinear spin textures in metallic oxide heterostructures.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL (United States); Energy Frontier Research Centers (EFRC) (United States). Center for Emergent Superconductivity (CES); Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
National Institute of Standards and Technology (NIST); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences and Engineering Division
OSTI Identifier:
1333326
Alternate Identifier(s):
OSTI ID: 1339701; OSTI ID: 1342652
Report Number(s):
BNL-113488-2017-JA
Journal ID: ISSN 2160-3308; PRXHAE; 041038
Grant/Contract Number:  
AC02-06CH11357; AC02-98CH10886; SC00112704
Resource Type:
Published Article
Journal Name:
Physical Review. X
Additional Journal Information:
Journal Name: Physical Review. X Journal Volume: 6 Journal Issue: 4; Journal ID: ISSN 2160-3308
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Hoffman, Jason D., Kirby, Brian J., Kwon, Jihwan, Fabbris, Gilberto, Meyers, D., Freeland, John W., Martin, Ivar, Heinonen, Olle G., Steadman, Paul, Zhou, Hua, Schlepütz, Christian M., Dean, Mark P. M., te Velthuis, Suzanne G. E., Zuo, Jian-Min, and Bhattacharya, Anand. Oscillatory Noncollinear Magnetism Induced by Interfacial Charge Transfer in Superlattices Composed of Metallic Oxides. United States: N. p., 2016. Web. doi:10.1103/PhysRevX.6.041038.
Hoffman, Jason D., Kirby, Brian J., Kwon, Jihwan, Fabbris, Gilberto, Meyers, D., Freeland, John W., Martin, Ivar, Heinonen, Olle G., Steadman, Paul, Zhou, Hua, Schlepütz, Christian M., Dean, Mark P. M., te Velthuis, Suzanne G. E., Zuo, Jian-Min, & Bhattacharya, Anand. Oscillatory Noncollinear Magnetism Induced by Interfacial Charge Transfer in Superlattices Composed of Metallic Oxides. United States. https://doi.org/10.1103/PhysRevX.6.041038
Hoffman, Jason D., Kirby, Brian J., Kwon, Jihwan, Fabbris, Gilberto, Meyers, D., Freeland, John W., Martin, Ivar, Heinonen, Olle G., Steadman, Paul, Zhou, Hua, Schlepütz, Christian M., Dean, Mark P. M., te Velthuis, Suzanne G. E., Zuo, Jian-Min, and Bhattacharya, Anand. Tue . "Oscillatory Noncollinear Magnetism Induced by Interfacial Charge Transfer in Superlattices Composed of Metallic Oxides". United States. https://doi.org/10.1103/PhysRevX.6.041038.
@article{osti_1333326,
title = {Oscillatory Noncollinear Magnetism Induced by Interfacial Charge Transfer in Superlattices Composed of Metallic Oxides},
author = {Hoffman, Jason D. and Kirby, Brian J. and Kwon, Jihwan and Fabbris, Gilberto and Meyers, D. and Freeland, John W. and Martin, Ivar and Heinonen, Olle G. and Steadman, Paul and Zhou, Hua and Schlepütz, Christian M. and Dean, Mark P. M. and te Velthuis, Suzanne G. E. and Zuo, Jian-Min and Bhattacharya, Anand},
abstractNote = {Interfaces between correlated complex oxides are promising avenues to realize new forms of magnetism that arise as a result of charge transfer, proximity effects, and locally broken symmetries. We report on the discovery of a noncollinear magnetic structure in superlattices of the ferromagnetic metallic oxide La2/3Sr1/3MnO3 (LSMO) and the correlated metal LaNiO3 (LNO). The exchange interaction between LSMO layers is mediated by the intervening LNO, such that the angle between the magnetization of neighboring LSMO layers varies in an oscillatory manner with the thickness of the LNO layer. The magnetic field, temperature, and spacer thickness dependence of the noncollinear structure are inconsistent with the bilinear and biquadratic interactions that are used to model the magnetic structure in conventional metallic multilayers. A model that couples the LSMO layers to a helical spin state within the LNO fits the observed behavior. We propose that the spin-helix results from the interaction between a spatially varying spin susceptibility within the LNO and interfacial charge transfer that creates localized Ni2+ states. In conclusion, our work suggests a new approach to engineering noncollinear spin textures in metallic oxide heterostructures.},
doi = {10.1103/PhysRevX.6.041038},
journal = {Physical Review. X},
number = 4,
volume = 6,
place = {United States},
year = {Tue Nov 22 00:00:00 EST 2016},
month = {Tue Nov 22 00:00:00 EST 2016}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1103/PhysRevX.6.041038

Citation Metrics:
Cited by: 42 works
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Figures / Tables:

FIG. 1 FIG. 1: Structural characterization of (LaNiO3)n/(La2/3Sr1/3MnO3)9 superlattices. Measured x-ray reflectivity and fit for the n = 9 superlattice on SrTiO3. The arrows mark the position of the even-order superlattice reflections, which are strongly suppressed by the structural symmetry of the sample. (Inset) High-resolution transmission electron micrograph of the same superlattice.

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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.