Ferroelectric Control of Magnetic Anisotropy

Mardana, Abhijit; Ducharme, Stephen; Adenwalla, Shireen

doi:10.1021/nl201965r

Cited by 105 publications

(96 citation statements)

References 27 publications

(48 reference statements)

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“…13 These results agree with the report of significant magnetic anisotropy change that has been experimentally detected in this system using magneto-optical Kerr effect (MOKE) analysis. 14 One of the most interesting features offered by the structures combining ferroelectricity and ferromagnetism is a possibility to influence the magnetic properties locally by electrical writing of stable ferroelectric domains. 15,16 Here, we address this topic focusing on the structures with fieldeffect-mediated local control of magnetic domain nucleation and growth in ultra-thin Co layer at room temperature.…”

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confidence: 99%

Ferroelectric control of magnetic domains in ultra-thin cobalt layers

et al. 2013

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International audienceNon-volatile ferroelectric control of magnetic domains has been demonstrated in ultra-thin cobaltlayers at room temperature. The sensitivity of magnetic anisotropy energy to the electronic structurein a few atomic layers adjacent to the interface allows for ferroelectric control of coercivity andmagnetic domain dynamics. These effects have been monitored and quantified using magnetoopticalKerr effect. In particular, the regimes, where the ferroelectric domains enhance/inhibit themagnetic domain nucleation or increase/reduce domain wall velocity, have been explored. Thus,non-destructive and reversible ferroelectric domain writing provides a tool to define the magneticdomain paths, create nucleation sites, or control domain movement

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confidence: 99%

Ferroelectric control of magnetic domains in ultra-thin cobalt layers

et al. 2013

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“…Recently Mardana et al 30 have demonstrated experimentally that PVDF copolymers can be efficiently used to tailor the interface MCA of an adjacent ferromagnetic Co layer. Using a wedge-shaped Co film of varying thickness interfaced with a PVDF copolymer they showed that the magnetic anisotropy of the Co films changes by as much as 50% when the ferroelectric polarization of PVDF is switched from up to down.…”

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confidence: 99%

“…Our results offer new insights into the mechanism of the magnetoelectric coupling at organic ferroelectric/ferromagnet interfaces and provide theoretical grounds for the earlier reported experimental findings. 30 …”

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confidence: 99%

Ferroelectric Control of Magnetocrystalline Anisotropy at Cobalt/Poly(vinylidene fluoride) Interfaces

et al. 2012

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Electric field control of magnetization is one of the promising avenues for achieving high-density energy-efficient magnetic data storage. Ferroelectric materials can be especially useful for that purpose as a source of very large switchable electric fields when interfaced with a ferromagnet. Organic ferroelectrics, such as poly(vinylidene fluoride) (PVDF), have an additional advantage of being weakly bonded to the ferromagnet, thus minimizing undesirable effects such as interface chemical modification and/or strain coupling. In this work we use first-principles density functional calculations of Co/PVDF heterostructures to demonstrate the effect of ferroelectric polarization of PVDF on the interface magnetocrystalline anisotropy that controls the magnetization orientation. We show that switching of the polarization direction alters the magnetocrystalline anisotropy energy of the adjacent Co layer by about 50%, driven by the modification of the screening charge induced by ferroelectric polarization. The effect is reduced with Co oxidation at the interface due to quenching the interface magnetization. Our results provide a new insight into the mechanism of the magnetoelectric coupling at organic ferroelectric/ferromagnet interfaces and suggest ways to achieve the desired functionality in practice.

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“…[1][2][3][4][5] Consequently, numerous studies have been carried on the electric-field control of magnetic properties, such as the electric-field control of coercive filed in Fe/BaTiO 3 4 and so on. [5][6][7][8][9][10][11][12][13][14][15] Among them, the control of magnetic anisotropy with electric field has attracted special attention for its possible applications. [6][7][8][9][10] For instance, the regulation of the easy axis up to 90…”

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confidence: 99%

Electric-field control of magnetic anisotropy in Fe81Ga19/BaTiO3 heterostructure films

et al. 2014

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We investigate the control of magnetism with an electric field in Fe81Ga19(FeGa)/BaTiO3(BTO) heterostructure films. The as-prepared FeGa/BTO samples present a uniaxial magnetic anisotropy, which is ascribed to be induced by the spontaneous ferroelectric polarization of the BTO substrates. With the electric field applied on the BTO substrates increasing from 0 to 6 kV/cm, the coercivity of FeGa films measured along the BTO[110] direction increases from 28 to 41 Oe, while the squareness of the hysteresis loop decreases from 0.99 to 0.31, which indicates that the easy and hard axes of FeGa films are swapped. The ferroelectric domains of BTO substrates and the magnetic domains of FeGa films exhibit the same dependence on the applied electric fields, manifesting the strong magnetoelectric coupling between the ferroelectricity of BTO substrates and the magnetism of FeGa films.

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Ferroelectric Control of Magnetic Anisotropy

Cited by 105 publications

References 27 publications

Ferroelectric control of magnetic domains in ultra-thin cobalt layers

Ferroelectric control of magnetic domains in ultra-thin cobalt layers

Ferroelectric Control of Magnetocrystalline Anisotropy at Cobalt/Poly(vinylidene fluoride) Interfaces

Electric-field control of magnetic anisotropy in Fe81Ga19/BaTiO3 heterostructure films

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