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

doi:10.1088/0022-3727/48/30/305005

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 journal › Article › peer-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 (M_r/M_s) 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 language	English
Article number	305005
Journal	Journal of Physics D: Applied Physics
Volume	48
Issue number	30
Early online date	3 Jul 2015
DOIs	https://doi.org/10.1088/0022-3727/48/30/305005
Publication status	Published - 5 Aug 2015
Externally published	Yes

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

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.",

keywords = "cobalt iron film (CoFe), magnetoelectric coupling, microstructure, multiferroic heterostructure",

author = "Yang, {Wei Gang} and Morley, {Nicola A.} and Joanne Sharp and Rainforth, {W. Mark}",

year = "2015",

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doi = "10.1088/0022-3727/48/30/305005",

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AU - Yang, Wei Gang

AU - Morley, Nicola A.

AU - Sharp, Joanne

AU - Rainforth, W. Mark

PY - 2015/8/5

Y1 - 2015/8/5

N2 - 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.

AB - 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.

KW - cobalt iron film (CoFe)

KW - magnetoelectric coupling

KW - microstructure

KW - multiferroic heterostructure

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

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