Strain-mediated converse magnetoelectric coupling strength manipulation by a thin titanium layer

Wei Gang Yang; Nicola A. Morley; Joanne Sharp; Ye Tian; W. Mark Rainforth

doi:10.1063/1.4939111

Strain-mediated converse magnetoelectric coupling strength manipulation by a thin titanium layer

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

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

The manipulation of the strain-mediated magnetoelectric (ME) coupling strength is investigated by inserting a thin Ti layer (0-10 nm) between a 50 nm Co₅₀Fe₅₀ layer and a (011) oriented lead magnesium niobate-lead titanate (PMN-PT) substrate. A record high remanence ratio (M_r/M_s) tunability of 100% has been demonstrated in the 50 nm CoFe/8 nm Ti/PMN-PT heterostructure, when a total in-plane piezoelectric strain of -1821 ppm was applied at an electric field (E-field) of 16 kV/cm. The ME coupling strength is gradually optimized as the Ti layer thickness increases. Magnetic energy calculation showed that with increasing Ti layer thickness the uniaxial magnetic anisotropy energy (E_uni) was reduced from 43 ± 1 kJ/m³ to 29.8 ± 1 kJ/m³. The reduction of E_uni makes the strain effect dominant in the total magnetic energy, thus gives an obvious enhanced ME coupling strength.

Original language	English
Article number	012901
Journal	Applied Physics Letters
Volume	108
Issue number	1
DOIs	https://doi.org/10.1063/1.4939111
Publication status	Published - 4 Jan 2016
Externally published	Yes

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title = "Strain-mediated converse magnetoelectric coupling strength manipulation by a thin titanium layer",

abstract = "The manipulation of the strain-mediated magnetoelectric (ME) coupling strength is investigated by inserting a thin Ti layer (0-10 nm) between a 50 nm Co50Fe50 layer and a (011) oriented lead magnesium niobate-lead titanate (PMN-PT) substrate. A record high remanence ratio (Mr/Ms) tunability of 100% has been demonstrated in the 50 nm CoFe/8 nm Ti/PMN-PT heterostructure, when a total in-plane piezoelectric strain of -1821 ppm was applied at an electric field (E-field) of 16 kV/cm. The ME coupling strength is gradually optimized as the Ti layer thickness increases. Magnetic energy calculation showed that with increasing Ti layer thickness the uniaxial magnetic anisotropy energy (Euni) was reduced from 43 ± 1 kJ/m3 to 29.8 ± 1 kJ/m3. The reduction of Euni makes the strain effect dominant in the total magnetic energy, thus gives an obvious enhanced ME coupling strength.",

keywords = "Electric fields, Magnetism, Magnetic anisotropy",

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

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T1 - Strain-mediated converse magnetoelectric coupling strength manipulation by a thin titanium layer

AU - Yang, Wei Gang

AU - Morley, Nicola A.

AU - Sharp, Joanne

AU - Tian, Ye

AU - Rainforth, W. Mark

PY - 2016/1/4

Y1 - 2016/1/4

N2 - The manipulation of the strain-mediated magnetoelectric (ME) coupling strength is investigated by inserting a thin Ti layer (0-10 nm) between a 50 nm Co50Fe50 layer and a (011) oriented lead magnesium niobate-lead titanate (PMN-PT) substrate. A record high remanence ratio (Mr/Ms) tunability of 100% has been demonstrated in the 50 nm CoFe/8 nm Ti/PMN-PT heterostructure, when a total in-plane piezoelectric strain of -1821 ppm was applied at an electric field (E-field) of 16 kV/cm. The ME coupling strength is gradually optimized as the Ti layer thickness increases. Magnetic energy calculation showed that with increasing Ti layer thickness the uniaxial magnetic anisotropy energy (Euni) was reduced from 43 ± 1 kJ/m3 to 29.8 ± 1 kJ/m3. The reduction of Euni makes the strain effect dominant in the total magnetic energy, thus gives an obvious enhanced ME coupling strength.

AB - The manipulation of the strain-mediated magnetoelectric (ME) coupling strength is investigated by inserting a thin Ti layer (0-10 nm) between a 50 nm Co50Fe50 layer and a (011) oriented lead magnesium niobate-lead titanate (PMN-PT) substrate. A record high remanence ratio (Mr/Ms) tunability of 100% has been demonstrated in the 50 nm CoFe/8 nm Ti/PMN-PT heterostructure, when a total in-plane piezoelectric strain of -1821 ppm was applied at an electric field (E-field) of 16 kV/cm. The ME coupling strength is gradually optimized as the Ti layer thickness increases. Magnetic energy calculation showed that with increasing Ti layer thickness the uniaxial magnetic anisotropy energy (Euni) was reduced from 43 ± 1 kJ/m3 to 29.8 ± 1 kJ/m3. The reduction of Euni makes the strain effect dominant in the total magnetic energy, thus gives an obvious enhanced ME coupling strength.

KW - Electric fields

KW - Magnetism

KW - Magnetic anisotropy

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JO - Applied Physics Letters

JF - Applied Physics Letters

SN - 0003-6951

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ER -

Strain-mediated converse magnetoelectric coupling strength manipulation by a thin titanium layer

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