Magnetoelectric bilayer and multilayer structures of magnetostrictive and piezoelectric oxides

Srinivasan, G.; Rasmussen, Ebbe; Gallegos, J.; Srinivasan, Raghavan; Bokhan, Yu. I.; Лалетин, В. М.

doi:10.1103/physrevb.64.214408

Cited by 577 publications

(193 citation statements)

References 9 publications

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“…The last few years, however, have seen a tremendous revival of activity in magnetoelectrics 2 , motivated in large part by the entirely new device paradigms that would be enabled by electric-fieldcontrol of magnetism 5,6 . Progress has been fueled by the growth of novel single-phase 7,8 and composite 9,10 multiferroic materials, which show simultaneous magnetic and ferroelectric ordering and have the potential for significantly enhanced magnetoelectric responses.…”

mentioning

confidence: 99%

“…This behavior, and its inverse when a magnetic field is applied, are enhanced in materials with strong spin-orbit coupling (and hence strong coupling of the magnetic order to the lattice) and with large piezo-or electro-strictive response. In composites of magnetostrictive or piezomagnetic materials combined with electrostrictive or piezoelectrics, an extrinsic magnetoelectric coupling is mediated by strain at the interface 9,11 . Here an electric field causes strain in the electrical component which is mechanically transferred to the magnetic component where it changes the magnetization (and vice versa) 44 .…”

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confidence: 99%

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Carrier-mediated magnetoelectricity in complex oxide heterostructures

2007

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The search for a general means to control the coupling between electricity and magnetism has intrigued scientists since Ørsted's discovery of electromagnetism in the early 19 th century.While tremendous success has been achieved to date in creating both single phase and composite magnetoelectric materials, the quintessential electric-field control of magnetism remains elusive.In this work, we demonstrate a linear magnetoelectric effect which arises from a novel carriermediated mechanism, and is a universal feature of the interface between a dielectric and a spinpolarized metal. Using first-principles density functional calculations, we illustrate this effect at the SrRuO 3 /SrTiO 3 interface and describe its origin. To formally quantify the magnetic response of such an interface to an applied electric field, we introduce and define the concept of spin capacitance. In addition to its magnetoelectric and spin capacitive behavior, the interface displays a spatial coexistence of magnetism and dielectric polarization suggesting a route to a new type of interfacial multiferroic.

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confidence: 99%

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Carrier-mediated magnetoelectricity in complex oxide heterostructures

2007

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“…[29][30][31] The ME effect in such composites takes place via stress mediation, where the field induced strain in one phase leads to a stress on the adjacent phase, which ultimately varies the order parameter (polarization/magnetization) of the other phase. [32][33][34][35][36] Interestingly, the performance of such composites, gauged by the ME coupling coefficient α, is found to be highly sensitive to microstructure. [37][38][39][40] On the other hand, modeling predicts complex domain evolution in composites.…”

Section: Introductionmentioning

confidence: 99%

Sequential piezoresponse force microscopy and the ‘small-data’ problem

et al. 2018

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The term big-data in the context of materials science not only stands for the volume, but also for the heterogeneous nature of the characterization data-sets. This is a common problem in combinatorial searches in materials science, as well as chemistry. However, these data-sets may well be 'small' in terms of limited step-size of the measurement variables. Due to this limitation, application of higher-order statistics is not effective, and the choice of a suitable unsupervised learning method is restricted to those utilizing lower-order statistics. As an interesting case study, we present here variable magnetic-field Piezoresponse Force Microscopy (PFM) study of composite multiferroics, where due to experimental limitations the magnetic field dependence of piezoresponse is registered with a coarse step-size. An efficient extraction of this dependence, which corresponds to the local magnetoelectric effect, forms the central problem of this work. We evaluate the performance of Principal Component Analysis (PCA) as a simple unsupervised learning technique, by pre-labeling possible patterns in the data using Density Based Clustering (DBSCAN). Based on this combinational analysis, we highlight how PCA using non-central second-moment can be useful in such cases for extracting information about the local material response and the corresponding spatial distribution.

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“…25 Experimentally a strong decrease in ME coefficient with increasing layer number was found for the longitudinal mode and attributed to decreasing interface coupling. 20, 21 We will argue below that interface coupling plays a diminished role for resonant bending mode results of layered nanocomposites produced by thin film deposition techniques. However, theoretical modelling of ME multilayers is limited to the effective medium concept for longitudinal-mode operation, 26 finite-element method simulations, 27,28 or thermodynamic phase stability models for multiferroic multilayers on a substrate.…”

Section: Introductionmentioning

confidence: 99%

“…concepts, [20][21][22][23] e.g., giant magnetostriction from exchange coupling 24 and nonlinear effects such as spin reversal. 25 Experimentally a strong decrease in ME coefficient with increasing layer number was found for the longitudinal mode and attributed to decreasing interface coupling.…”

Section: Introductionmentioning

confidence: 99%

Theory of magnetoelectric effect in multilayer nanocomposites on a substrate: Resonant bending-mode response

Krantz

Gerken

2013

AIP Advances

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Resonant bending-mode magnetoelectric (ME) coefficients of magnetostrictive-piezoelectric multilayer cantilevers are calculated analytically using a model developed for arbitrary multilayers on a substrate. Without quality factor effects the ME coefficient maxima in the four-dimensional parameter space of layer numbers, layer sequences, piezoelectric volume fractions, and substrate thicknesses are found to be essentially constant for nonzero substrate thickness. Global maxima occur for bilayers without substrates. Vanishing magnetoelectric response regions result from voltage cancellation in piezoelectric layers or absence of bending-mode excitation. They are determined by the neutral plane position in the multilayer stack. With Q-factor effects dominated by viscous air damping ME coefficients strongly increase with cantilever thickness primarily due to increasing resonance frequencies. The results yield a layer specific prediction of ME coefficients, resonance frequencies, and Q-factors in arbitrary multilayers and thus distinction of linear-coupling and Q-factor effects from exchange interaction, interface, or nonlinear ME effects

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Magnetoelectric bilayer and multilayer structures of magnetostrictive and piezoelectric oxides

Cited by 577 publications

References 9 publications

Carrier-mediated magnetoelectricity in complex oxide heterostructures

Carrier-mediated magnetoelectricity in complex oxide heterostructures

Sequential piezoresponse force microscopy and the ‘small-data’ problem

Theory of magnetoelectric effect in multilayer nanocomposites on a substrate: Resonant bending-mode response

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