Giant electric field tunable magnetic properties in a Co50Fe50/lead magnesium niobate-lead titanate multiferroic heterostructure

Wei Gang Yang, Nicola A. Morley, Joanne Sharp, W. Mark Rainforth

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Co50Fe50/(0 1 1)-oriented lead magnesium niobate-lead titanate (PMN-PT) multiferroic (MF) heterostructures were fabricated by RF sputtering magnetic films onto PMN-PT substrates. The effect of magnetic layer thickness (30 nm to 100 nm) on the magnetoelectric (ME) coupling in the heterostructures was studied independently, due to the almost constant magnetostriction constant (λ = 40 ± 5 ppm) and similar as-grown magnetic anisotropies for all studied magnetic layer thicknesses. A record high remanence ratio (Mr/Ms) tunability of 95% has been demonstrated in the 65 nm Co50Fe50/PMN-PT heterostructure, corresponding to a large ME constant (α) of 2.5 × 10-6 s m-1, when an external electric field (E-field) of 9 kV cm-1 was applied. Such an MF heterostructure provides considerable opportunities for E-field-controlled multifunctional devices.

Original languageEnglish
Article number305005
JournalJournal of Physics D: Applied Physics
Volume48
Issue number30
Early online date3 Jul 2015
DOIs
Publication statusPublished - 5 Aug 2015
Externally publishedYes

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