Electric tuning of magnetization dynamics and electric field-induced negative magnetic permeability in nanoscale composite multiferroics

Jia, Chenglong; Wang, Fenglong; Jiang, Changjun; Berakdar, Jamal; Xue, Desheng

doi:10.1038/srep11111

Cited by 48 publications

(30 citation statements)

References 46 publications

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“…Such coupling mechanisms have indeed been reported theoretically and experimentally [20,21]. Performing large scale micro magnetic simulations for realistic material parameters we demonstrated how the features of the generated spin waves depend on a geometry of the stripe and the coupling at the interface.…”

Section: Discussionmentioning

confidence: 84%

“…Generally, composite FE/FM are most interesting, as in these materials the interfacial magnetoelectric coupling turned out to be quite sizable even at room temperature, as evidenced by numerous studies [16][17][18]21]. Experimental verification and a direct observation of the ME coupling was reported recently for Co/BaTiO 3 -interfaces [19] and Co 92 Zr 8 /PMN-PT-films [20]. Several coupling mechanisms are discussed in the literatures.…”

Section: Introductionmentioning

confidence: 96%

“…lattices mismatch between the FE and FM can strongly influence the magnetic properties like magnetic anisotropy in the FM layer [13,22,23]. For chargemediated ME coupling when the FM is metallic, the uncompensated charge at the edge of the FE are balanced by the itinerant electrons in the FM, which in turn are spin-polarized and also coupled via the exchange in- * Jamal.Berakdar@physik.uni-halle.de teraction to the net FM magnetization [16,20,21,25]. Generally, several coupling mechanisms are operational at the same time.…”

Section: Introductionmentioning

confidence: 99%

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Electrically driven magnetic antenna based on multiferroic composites

Wang

Sukhov

Chotorlishvili

et al. 2017

J. Phys.: Condens. Matter

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We suggest and demonstrate via large scale numerical simulations an electrically operated spinwave inducer based on composite multiferroic junctions. Specifically, we consider an interfacially coupled ferromagnetic/ferroelectric structure that emits controllably spin waves in the ferromagnets if the ferroelectric polarization is poled by an external electric field. The roles of geometry and material properties are discussed.

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Section: Discussionmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Electrically driven magnetic antenna based on multiferroic composites

Wang

Sukhov

Chotorlishvili

et al. 2017

J. Phys.: Condens. Matter

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“…Additionally, not only was a shift in the resonance field obtained, but an interesting change in the sign of the FMR lineshape was observed, which indicated that the excitations triggered by the electric field were transferred to the spin system via magnetoelectric coupling, as we previously reported. 23 As the temperature was increased, the shift in the resonance field increased and an obvious change in the sign of the lineshape occurred, which indicated the change of interface ME coupling in different temperature.…”

confidence: 99%

Temperature dependence of electric field tunable ferromagnetic resonance lineshape in multiferroic heterostructure

et al. 2016

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Herein, we experimentally investigate the effect of temperature on the electric field tunable ferromagnetic resonance (FMR) in a ferroelectric/ferromagnetic heterostructure, and demonstrate the tuning of abnormal change in FMR using the polarization of the ferroelectric layer above 200 K. The FMR was found to be almost unchanged under different electric field strength at 100 K owing to frozen polarization, which causes extremely weak magnetoelectric coupling. More interestingly, negative effective linewidth was observed when an electric field greater than 10 kV/cm was applied above 220 K. The simultaneous electrical control of magnetization and its damping via FMR based on linear magnetoelectric coupling are directly relevant to use of composite multiferroics for a wide range of devices.

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“…9 and using compressive stress to stretch the Olsen cycle and enhance the pyroelectric effect. This aspect is in sofar interesting for future studies, as strain mediated ME coupling is indeed well-established, in addition to other coupling mechanisms [20][21][22][23][24][25][26][27][28][29] .…”

mentioning

confidence: 99%

Efficient thermal energy harvesting using nanoscale magnetoelectric heterostructures

Etesami

Berakdar

2016

Applied Physics Letters

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Thermomechanical cycles with a ferroelectric working substance convert heat to electrical energy. As shown here, magnetoelectrically coupled ferroelectric/ferromangtic composites (also called multiferroics) add new functionalities and allow for an efficient thermal energy harvesting at room temperature by exploiting the pyroelectric effect. By virtue of the magnetoelectric coupling, external electric and magnetic fields can steer the operation of these heat engines. Our theoretical predictions are based on a combination of LandauKhalatnikov-Tani approach (with a Ginzburg-Landau-Devonshire potential) to simulate the ferroelectric dynamics coupled to the magnetic dynamics. The latter is treated via the electric-polarization-dependent Landau-Lifshitz-Gilbert equation. Performing an adapted Olsen cycle we show that a multiferroic working substance is potentially much more superior to sole ferroelectrics, as far as thermal energy harvesting using pyroelectric effect is concerned. Our proposal holds promise not only for low-energy consuming devices but also for cooling technology.It's been known for more than half a century that the temperature-dependency of hysteresis loops in ferroelectrics(FE) can be exploited to convert heat into electrical energy, known as pyroelectric effect 1-9 . The converse pyroelectric effect is also an established fact called the electrocaloric effect [10][11][12][13] , which as expected is used in cooling technology. In the quest for environmentally friendly pyroelectric devices that have low energy consumption, multiple functionalities, and being amenable to integration in nano circuits, we explore in this work the potential of engineered nanoscale multiferroic structures for harvesting waste heat. In particular, we focus on two-phase multiferroic layered structures consisting of a thin layer of the prototypical ferroelectric BaTiO 3 (BTO) deposited on Co. At room temperatures a strong magnetoelectric (ME) coupling between BTO and Co 14 was observed. This means that the ferromagnetic Co or BTO respond to an electric (E) or magnetic field (H), respectively opening thus new opportunities for controlling and the possibility for enhancing the device operation. Particularly important are room temperature devices in which case BTO is in the tetragonal phase 15-17 (see also the supplementary material 18 , Fig. S2). To exploit the pyroelectric effect to generate electricity, different thermal-electrical cycles were proposed. We perform the Olsen cycle 6,8 : The core idea of the pyroelectric engine is the temperature-dependency of the hysteresis loop (or in other words polarization P ) since it provides us with the opportunity to create clockwise cycles in E − P space (see the supplementary material 18 , Fig. S1). The area enclosed by the clockwise cycles determines the amount of harvested thermal energy asViewing the ferroelectric (FE) to be consisting of building blocks (cells or domains) each with a volume a 3 (see Fig. 1) then the FE volume is V F E = n a 3 .V F E P = n a 3 P n is the total ch...

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Electric tuning of magnetization dynamics and electric field-induced negative magnetic permeability in nanoscale composite multiferroics

Cited by 48 publications

References 46 publications

Electrically driven magnetic antenna based on multiferroic composites

Electrically driven magnetic antenna based on multiferroic composites

Temperature dependence of electric field tunable ferromagnetic resonance lineshape in multiferroic heterostructure

Efficient thermal energy harvesting using nanoscale magnetoelectric heterostructures

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