Spin conduction and interfacial effects in La2/3Sr1/3MnO3/NiO/Pt heterostructures

In this work we report on the generation and transport of pure spin currents in La2/3Sr1/3MnO3(LSMO)/NiO/Pt heterostructures. Pure spin currents, generated by means of spin pumping in the LSMO layer, are transmitted through the NiO layer and detected by measuring the transverse voltage signal genera...

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Detalles Bibliográficos
Autores: Chen, Shoulong, Pomar, Alberto, Balcells, Lluis, Konstantinovic, Zorica, Frontera, Carlos, Magén, César, Mestres, Narcís, Martínez Perea, Benjamín
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2025
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/382028
Acceso en línea:http://hdl.handle.net/10261/382028
https://api.elsevier.com/content/abstract/scopus_id/85208334804
Access Level:acceso abierto
Palabra clave:Antiferromagnets
Complex oxides heterostructures
Inverse spin Hall effect
Spin currents transmission
Spin pumping
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dc.title.none.fl_str_mv Spin conduction and interfacial effects in La2/3Sr1/3MnO3/NiO/Pt heterostructures
title Spin conduction and interfacial effects in La2/3Sr1/3MnO3/NiO/Pt heterostructures
spellingShingle Spin conduction and interfacial effects in La2/3Sr1/3MnO3/NiO/Pt heterostructures
Chen, Shoulong
Antiferromagnets
Complex oxides heterostructures
Inverse spin Hall effect
Spin currents transmission
Spin pumping
title_short Spin conduction and interfacial effects in La2/3Sr1/3MnO3/NiO/Pt heterostructures
title_full Spin conduction and interfacial effects in La2/3Sr1/3MnO3/NiO/Pt heterostructures
title_fullStr Spin conduction and interfacial effects in La2/3Sr1/3MnO3/NiO/Pt heterostructures
title_full_unstemmed Spin conduction and interfacial effects in La2/3Sr1/3MnO3/NiO/Pt heterostructures
title_sort Spin conduction and interfacial effects in La2/3Sr1/3MnO3/NiO/Pt heterostructures
dc.creator.none.fl_str_mv Chen, Shoulong
Pomar, Alberto
Balcells, Lluis
Konstantinovic, Zorica
Frontera, Carlos
Magén, César
Mestres, Narcís
Martínez Perea, Benjamín
author Chen, Shoulong
author_facet Chen, Shoulong
Pomar, Alberto
Balcells, Lluis
Konstantinovic, Zorica
Frontera, Carlos
Magén, César
Mestres, Narcís
Martínez Perea, Benjamín
author_role author
author2 Pomar, Alberto
Balcells, Lluis
Konstantinovic, Zorica
Frontera, Carlos
Magén, César
Mestres, Narcís
Martínez Perea, Benjamín
author2_role author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Agencia Estatal de Investigación (España)
Ministerio de Ciencia, Innovación y Universidades (España)
China Scholarship Council
European Commission
#NODATA#
#NODATA#
#NODATA#
#NODATA#
#NODATA#
#NODATA#
#NODATA#
#NODATA#
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Antiferromagnets
Complex oxides heterostructures
Inverse spin Hall effect
Spin currents transmission
Spin pumping
topic Antiferromagnets
Complex oxides heterostructures
Inverse spin Hall effect
Spin currents transmission
Spin pumping
description In this work we report on the generation and transport of pure spin currents in La2/3Sr1/3MnO3(LSMO)/NiO/Pt heterostructures. Pure spin currents, generated by means of spin pumping in the LSMO layer, are transmitted through the NiO layer and detected by measuring the transverse voltage signal generated by the inverse spin Hall effect (ISHE) in the Pt layer. The spin current transmission is studied as a function of the NiO thickness and temperature. NiO layers grown at room temperature are polycrystalline and their microstructural and magnetic features clearly depend on thickness. Scanning transmission electron microscopy techniques revealed that homogeneous conformal coating of the LSMO layer is only achieved for NiO layer thicknesses above about 2 nm. Below this critical thickness the NiO layer is discontinuous and its main role would be to disturb the LSMO/Pt interface causing it to behave as something similar to an insulating barrier. Magnetic measurements indicate that NiO layers are paramagnetic (PM) well below room temperature. In agreement with these observations, the amplitude of the ISHE voltage signal decreases monotonically on lowering temperature and makes evident that there are two spin conduction regimes as a function of the NiO layer thickness with different spin diffusion lengths. For thin discontinuous NiO layers a spin diffusion length of λSDL≈0.8 nm is found, which is slightly larger than typical values found for insulating barriers, but definitely smaller than λSDL≈3.8 nm found for NiO layer thickness above 2 nm. The latter being similar to λSDL previously reported for epitaxial NiO layers. Our findings indicate that inserting a PM NiO insulating layer of optimal thickness improves the spin transparency of the LSMO/Pt interface. Additionally, the results suggest that spin conduction through the NiO layer is likely driven by magnetic correlations and short-range thermal magnons.
publishDate 2025
dc.date.none.fl_str_mv 2025
2025
2025
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http://purl.org/coar/resource_type/c_6501
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info:eu-repo/semantics/acceptedVersion
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dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/382028
https://api.elsevier.com/content/abstract/scopus_id/85208334804
url http://hdl.handle.net/10261/382028
https://api.elsevier.com/content/abstract/scopus_id/85208334804
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
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Journal of Alloys and Compounds
The underlying dataset has been published as supplementary material of the article in the publisher platform at DOI 10.1016/j.jallcom.2024.177453
http://doi.org/10.1016/j.jallcom.2024.177453
Sí
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dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
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spelling Spin conduction and interfacial effects in La2/3Sr1/3MnO3/NiO/Pt heterostructuresChen, ShoulongPomar, AlbertoBalcells, LluisKonstantinovic, ZoricaFrontera, CarlosMagén, CésarMestres, NarcísMartínez Perea, BenjamínAntiferromagnetsComplex oxides heterostructuresInverse spin Hall effectSpin currents transmissionSpin pumpingIn this work we report on the generation and transport of pure spin currents in La2/3Sr1/3MnO3(LSMO)/NiO/Pt heterostructures. Pure spin currents, generated by means of spin pumping in the LSMO layer, are transmitted through the NiO layer and detected by measuring the transverse voltage signal generated by the inverse spin Hall effect (ISHE) in the Pt layer. The spin current transmission is studied as a function of the NiO thickness and temperature. NiO layers grown at room temperature are polycrystalline and their microstructural and magnetic features clearly depend on thickness. Scanning transmission electron microscopy techniques revealed that homogeneous conformal coating of the LSMO layer is only achieved for NiO layer thicknesses above about 2 nm. Below this critical thickness the NiO layer is discontinuous and its main role would be to disturb the LSMO/Pt interface causing it to behave as something similar to an insulating barrier. Magnetic measurements indicate that NiO layers are paramagnetic (PM) well below room temperature. In agreement with these observations, the amplitude of the ISHE voltage signal decreases monotonically on lowering temperature and makes evident that there are two spin conduction regimes as a function of the NiO layer thickness with different spin diffusion lengths. For thin discontinuous NiO layers a spin diffusion length of λSDL≈0.8 nm is found, which is slightly larger than typical values found for insulating barriers, but definitely smaller than λSDL≈3.8 nm found for NiO layer thickness above 2 nm. The latter being similar to λSDL previously reported for epitaxial NiO layers. Our findings indicate that inserting a PM NiO insulating layer of optimal thickness improves the spin transparency of the LSMO/Pt interface. Additionally, the results suggest that spin conduction through the NiO layer is likely driven by magnetic correlations and short-range thermal magnons.This work has received funding from the State Investigation Agency, through the Severo Ochoa Programme for Centres of Excellence in R&D (CEX2023–001263-S) and “OXISOT” (PID2021–128410OB-I00) and “AMONANO” (PID2020–112914RB-I00) and HTSUPERFUN (PID2021–124680OB-I00) funded by MCIN/AEI/ 10.13039/501100011033 and by “ERDF A way of making Europe”, by the “European Union”. Shoulong Chen acknowledges financial support from the China Scholarship Council (CSC). This work has been performed in the framework of the Ph.D. program in Materials Science of the Universitat Autònoma de Barcelona (UAB), through the CSC/UAB Joint Scholarship program.With funding from the Spanish government through the ‘Severo Ochoa Centre of Excellence’ accreditation (CEX2023-001263-S).Peer reviewedElsevierAgencia Estatal de Investigación (España)Ministerio de Ciencia, Innovación y Universidades (España)China Scholarship CouncilEuropean Commission#NODATA##NODATA##NODATA##NODATA##NODATA##NODATA##NODATA##NODATA#Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202520252025info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionapplication/pdfhttp://hdl.handle.net/10261/382028https://api.elsevier.com/content/abstract/scopus_id/85208334804reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/AEI/Plan Estatal de investigación Científica y Técnica y de Innovación 2021-2023/CEX2023-001263-Sinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PID2021-128410OB-I00info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PID2021-124680OB-I00info:eu-repo/grantAgreement/MICINN/Plan Estatal de investigación Científica y Técnica y de Innovación 2021-2023/PID2021–124680OB-I00Journal of Alloys and CompoundsThe underlying dataset has been published as supplementary material of the article in the publisher platform at DOI 10.1016/j.jallcom.2024.177453http://doi.org/10.1016/j.jallcom.2024.177453Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3820282026-05-22T06:33:51Z
score 15,81155

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