Polarization screening-induced magnetic phase gradients at complex oxide interfaces

Steven R. Spurgeon, Prasanna V. Balachandran, Despoina M. Kepaptsoglou, Anoop R. Damodaran, J. Karthik, Siamak Nejati, Lewys Jones, Haile Ambaye, Valeria Lauter, Quentin M. Ramasse, Kenneth K.S. Lau, Lane W. Martin, James M. Rondinelli, Mitra L. Taheri

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

Thin-film oxide heterostructures show great potential for use in spintronic memories, where electronic charge and spin are coupled to transport information. Here we use a La 0.7 Sr 0.3 MnO 3 (LSMO)/PbZr 0.2 Ti 0.8 O 3 (PZT) model system to explore how local variations in electronic and magnetic phases mediate this coupling. We present direct, local measurements of valence, ferroelectric polarization and magnetization, from which we map the phases at the LSMO/PZT interface. We combine these experimental results with electronic structure calculations to elucidate the microscopic interactions governing the interfacial response of this system. We observe a magnetic asymmetry at the LSMO/PZT interface that depends on the local PZT polarization and gives rise to gradients in local magnetic moments; this is associated with a metal-insulator transition at the interface, which results in significantly different charge-transfer screening lengths. This study establishes a framework to understand the fundamental asymmetries of magnetoelectric coupling in oxide heterostructures

Original languageEnglish (US)
Article number6735
JournalNature communications
Volume6
DOIs
StatePublished - Apr 16 2015

Fingerprint

Oxides
Heterojunctions
Screening
screening
Polarization
gradients
Magnetoelectronics
Metal insulator transition
oxides
polarization
Magnetic moments
asymmetry
Ferroelectric materials
Electronic structure
Charge transfer
Magnetization
Metals
electronics
Data storage equipment
Thin films

ASJC Scopus subject areas

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

Cite this

Spurgeon, S. R., Balachandran, P. V., Kepaptsoglou, D. M., Damodaran, A. R., Karthik, J., Nejati, S., ... Taheri, M. L. (2015). Polarization screening-induced magnetic phase gradients at complex oxide interfaces. Nature communications, 6, [6735]. https://doi.org/10.1038/ncomms7735

Polarization screening-induced magnetic phase gradients at complex oxide interfaces. / Spurgeon, Steven R.; Balachandran, Prasanna V.; Kepaptsoglou, Despoina M.; Damodaran, Anoop R.; Karthik, J.; Nejati, Siamak; Jones, Lewys; Ambaye, Haile; Lauter, Valeria; Ramasse, Quentin M.; Lau, Kenneth K.S.; Martin, Lane W.; Rondinelli, James M.; Taheri, Mitra L.

In: Nature communications, Vol. 6, 6735, 16.04.2015.

Research output: Contribution to journalArticle

Spurgeon, SR, Balachandran, PV, Kepaptsoglou, DM, Damodaran, AR, Karthik, J, Nejati, S, Jones, L, Ambaye, H, Lauter, V, Ramasse, QM, Lau, KKS, Martin, LW, Rondinelli, JM & Taheri, ML 2015, 'Polarization screening-induced magnetic phase gradients at complex oxide interfaces', Nature communications, vol. 6, 6735. https://doi.org/10.1038/ncomms7735
Spurgeon SR, Balachandran PV, Kepaptsoglou DM, Damodaran AR, Karthik J, Nejati S et al. Polarization screening-induced magnetic phase gradients at complex oxide interfaces. Nature communications. 2015 Apr 16;6. 6735. https://doi.org/10.1038/ncomms7735
Spurgeon, Steven R. ; Balachandran, Prasanna V. ; Kepaptsoglou, Despoina M. ; Damodaran, Anoop R. ; Karthik, J. ; Nejati, Siamak ; Jones, Lewys ; Ambaye, Haile ; Lauter, Valeria ; Ramasse, Quentin M. ; Lau, Kenneth K.S. ; Martin, Lane W. ; Rondinelli, James M. ; Taheri, Mitra L. / Polarization screening-induced magnetic phase gradients at complex oxide interfaces. In: Nature communications. 2015 ; Vol. 6.
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