Ferroelectric Control of Spin Polarization

Garcia, Vincent; Bibès, Manuel; Bocher, Laura; València, S.; Kronast, Florian; Crassous, Arnaud; Moya, Xavier; Enouz-Védrenne, Shaïma; Gloter, Alexandre; Imhoff, D.; Deranlot, C.; Mathur, N. D.; Fusil, S.; Bouzéhouane, K.; Barthélémy, A.

doi:10.1126/science.1184028

Cited by 660 publications

(508 citation statements)

References 39 publications

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“…The TER associated with ferroelectric polarization switching has been observed experimentally in BaTiO 3 -and PbTiO 3 -based FTJs in which either La 2/3 Sr 1/3 MnO 3 or SrRuO 3 is used as one of the electrodes while the other side of the ferroelectric thin film is in contact with the tip of an atomic force microscope [24][25][26] . The predicted simultaneous TMR and TER effects 23 have also been demonstrated experimentally in La 2/3 Sr 1/3 MnO 3 /BaTiO 3 /Fe (or Co) MFTJs [27][28][29][30][31][32][33][34] . Although the majority of the work deals with low bias, the existence of TER at finite bias has been predicted based on calculations using a semiclassical approximation 19 and first-principles 35 in FTJs, and model tight-binding calculations in MFTJs 36 .…”

Section: Introductionmentioning

confidence: 78%

Ferroelectric control of spin-transfer torque in multiferroic tunnel junctions

et al. 2015

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Based on model calculations we predict electric-field control of the spin transfer torque (STT) in magnetic tunnel junctions with ferroelectric barriers. We demonstrate that the bias dependence of the in-plane, T , and out-of-plane, T ⊥ , components of the STT can be dramatically modified by the ferroelectric polarization. In particular, the magnitude of the STT can be enhanced or suppressed by switching the polarization direction and in some cases the sign of STT can be toggled. The underlying mechanism is the combination of polarization-induced symmetry breaking and the interplay of the bias-induced and polarization-induced spin-dependent screening giving rise to a rich behavior of the electrostatic potential energy profile. These properties could lead to enhanced switching efficiency in STT-based devices and open a new avenue for applications of multiferroic devices.

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Section: Introductionmentioning

confidence: 78%

Ferroelectric control of spin-transfer torque in multiferroic tunnel junctions

et al. 2015

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“…13 The energetic ordering of the e g orbitals on each Mn site as well as neighboring Mn sites profoundly affects the ground state magnetic properties. [14][15][16][17][18][19][20] Although structural distortions (e.g., Jahn-Teller or GdFeO 3 distortions) are common for bulk perovskite manganites, they only weakly remove orbital degeneracy. 13 With the development of epitaxial thin film growth techniques, it is possible to remove orbital degeneracy through straininduced Jahn-Teller-like distortions.…”

mentioning

confidence: 99%

Reversible Modulation of Orbital Occupations via an Interface-Induced Polar State in Metallic Manganites

Chen¹,

Qiao

Marshall³

et al. 2014

Nano Lett.

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“…The spin filter efficiency was strongly affected by exchange splitting of ferromagnets and the asymmetric energy potentials derived from the opposite polarizations at the interface. In 2010, Garcia et al [49] demonstrated the polarization-dependent TMR up to −17% in a (5 nm) Fe/(1 nm) BTO/ (30 nm) LSMO heterostructures at 4.2 K. Typically, spin polarization was the key parameter to control the behavior of the TMR effect [50]. The spin-polarization-dependent tunneling was very sensitive to the interfacial states of Fe/ BTO and BTO/LSMO, which could be controlled by opposite polarizations as shown in Fig.…”

Section: Charge Transfermentioning

confidence: 99%

Magnetoelectric coupling across the interface of multiferroic nanocomposites

Yao

Lin

et al. 2015

Sci. China Mater.

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In recent decades, magnetoelectric effect in multiferroic materials has attracted extensive attention owing to the upcoming demands for new-generation multi-functional magnetoelectronic devices, such as transducer, sensor and so on. This gives people a strong push to explore the multiferroic materials with a reduced dimension and effective coupling between electric and magnetic orderings, especially at room temperature. Due to the weak magnetoelectric coupling strength in sing-phase multiferroic materials, scientists start to design nanocomposites and artificial nanostructures with strong coupling among order parameters (lattice, charge, spin and orbital). In this review, we will introduce recent major progresses of magnetoelectric coupling in multiferroic nanocomposites across their interfaces from the following four aspects: strain effect, charge transfer, magnetic exchange interaction and orbital hybridization, based on their coupling mechanisms. Through a full understanding of the above coupling among these orderings, it is possible to achieve the nanoscale modulation of magnetization (ferroelectric polarization) by external electric (magnetic) field. Apart from the magnetoelectric coupling, those artificially functional nanocomposites provide us a platform to explore and study the emerging physical phenomena so that we can design self-assembled nanostructures to tailor novel functionalities in future applications.

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Ferroelectric Control of Spin Polarization

Cited by 660 publications

References 39 publications

Ferroelectric control of spin-transfer torque in multiferroic tunnel junctions

Ferroelectric control of spin-transfer torque in multiferroic tunnel junctions

Reversible Modulation of Orbital Occupations via an Interface-Induced Polar State in Metallic Manganites

Magnetoelectric coupling across the interface of multiferroic nanocomposites

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