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 La0.7Sr0.3MnO3 (LSMO)/PbZr0.2Ti0.8O3 (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.
journal_name
Nat Communjournal_title
Nature communicationsauthors
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 MLdoi
10.1038/ncomms7735subject
Has Abstractpub_date
2015-04-16 00:00:00pages
6735issn
2041-1723pii
ncomms7735journal_volume
6pub_type
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