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Conference Paper: Effect of interlayer-induced asymmetrical stress on magnetotransport properties of epitaxial [Pr0.7Sr0.3MnO3/La0.5Ca0.5MnO3]20 superlattice

TitleEffect of interlayer-induced asymmetrical stress on magnetotransport properties of epitaxial [Pr0.7Sr0.3MnO3/La0.5Ca0.5MnO3]20 superlattice
Authors
Issue Date2015
PublisherIEEE. The Journal's web site is located at http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=7128764
Citation
The 2015 IEEE International Magnetics Conference (INTERMAG 2015), Beijing, China, 11-15 May 2015. In Conference Proceedings, 2015, p. 1-1 How to Cite?
AbstractPerovskite manganite R1-xAxMnO3 (R=rare earth, A=alkaline earth) has been attracting great research interesting due to its magnetoelectronic phenomena such as colossal magnetoresistance (CMR), charge-orbital ordering, and metal-insulator transitions, etc.[1,2] In manganite superlattice, interfacial effects including cation intermixing, charge transfer, exchange coupling, strain and defect formation are crucial in determining the magnetic and transport properties of superlattice. [3-5] In this work, all-manganite [Pr0.7Sr0.3MnO3/La0.5Ca0.5MnO3]20 superlattices were epitaxially fabricated on (001)-oriented single crystal MgO substrates with 24 nm La0.5Ca0.5MnO3 buffer layer by using plused laser deposition. All the as-grown superlattices are of single phase and single orientation (see Fig.1). We obtained various stress at interface by varying relative layer thickness. As the thickness of Pr0.7Sr0.3MnO3 layer and La0.5Ca0.5MnO3 layer is not identical, interlayer-induced asymmetrical stress will occur and result in lower metal-insulator (MI) transition temperature and larger magnetoresistance (MR) in a wider temperature range. This result indicated that [Pr0.7Sr0.3MnO3/La0.5Ca0.5MnO3]20 has opportunities for practical application in magnetic sensor and magnetic memory material. Furthermore, the percolation model has been used to quantitatively understand the transport mechanism of superlattice (see Fig.2). Our results demonstrated that inter-layer-induced asymmetrical stress accompanied with phase separation and charge ordering could strongly influence the magnetotransport properties of superlattice.
Persistent Identifierhttp://hdl.handle.net/10722/241028

 

DC FieldValueLanguage
dc.contributor.authorWang, H-
dc.contributor.authorLiu, H-
dc.contributor.authorCao, M-
dc.contributor.authorWang, X-
dc.contributor.authorTan, W-
dc.contributor.authorWang, X-
dc.contributor.authorXu, F-
dc.contributor.authorJia, Q-
dc.contributor.authorGao, J-
dc.date.accessioned2017-05-22T09:21:22Z-
dc.date.available2017-05-22T09:21:22Z-
dc.date.issued2015-
dc.identifier.citationThe 2015 IEEE International Magnetics Conference (INTERMAG 2015), Beijing, China, 11-15 May 2015. In Conference Proceedings, 2015, p. 1-1-
dc.identifier.urihttp://hdl.handle.net/10722/241028-
dc.description.abstractPerovskite manganite R1-xAxMnO3 (R=rare earth, A=alkaline earth) has been attracting great research interesting due to its magnetoelectronic phenomena such as colossal magnetoresistance (CMR), charge-orbital ordering, and metal-insulator transitions, etc.[1,2] In manganite superlattice, interfacial effects including cation intermixing, charge transfer, exchange coupling, strain and defect formation are crucial in determining the magnetic and transport properties of superlattice. [3-5] In this work, all-manganite [Pr0.7Sr0.3MnO3/La0.5Ca0.5MnO3]20 superlattices were epitaxially fabricated on (001)-oriented single crystal MgO substrates with 24 nm La0.5Ca0.5MnO3 buffer layer by using plused laser deposition. All the as-grown superlattices are of single phase and single orientation (see Fig.1). We obtained various stress at interface by varying relative layer thickness. As the thickness of Pr0.7Sr0.3MnO3 layer and La0.5Ca0.5MnO3 layer is not identical, interlayer-induced asymmetrical stress will occur and result in lower metal-insulator (MI) transition temperature and larger magnetoresistance (MR) in a wider temperature range. This result indicated that [Pr0.7Sr0.3MnO3/La0.5Ca0.5MnO3]20 has opportunities for practical application in magnetic sensor and magnetic memory material. Furthermore, the percolation model has been used to quantitatively understand the transport mechanism of superlattice (see Fig.2). Our results demonstrated that inter-layer-induced asymmetrical stress accompanied with phase separation and charge ordering could strongly influence the magnetotransport properties of superlattice.-
dc.languageeng-
dc.publisherIEEE. The Journal's web site is located at http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=7128764-
dc.relation.ispartofIEEE International Magnetics Conference (INTERMAG)-
dc.rightsIEEE International Magnetics Conference (INTERMAG). Copyright © IEEE.-
dc.rights©2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.-
dc.titleEffect of interlayer-induced asymmetrical stress on magnetotransport properties of epitaxial [Pr0.7Sr0.3MnO3/La0.5Ca0.5MnO3]20 superlattice-
dc.typeConference_Paper-
dc.identifier.emailGao, J: jugao@hku.hk-
dc.identifier.authorityGao, J=rp00699-
dc.description.natureLink_to_subscribed_fulltext-
dc.identifier.doi10.1109/INTMAG.2015.7156913-
dc.identifier.hkuros272109-
dc.identifier.spage1-
dc.identifier.epage1-
dc.publisher.placeUnited States-
dc.customcontrol.immutablesml 170525-

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