Recent Progress in Multiferroic Magnetoelectric Composites: from Bulk to Thin Films

Ma, Jing; Hu, Jie; Li, Zheng; Nan, Ce Wen

doi:10.1002/adma.201003636

Cited by 1,731 publications

(966 citation statements)

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“…the converse magnetoelectric (ME) effect, has become a central issue in the fields of spintronics and multiferroics [1][2][3][4][5][6][7][8][9][10]. It can provide a fast and extremely energy-efficient way for modulating magnetism compared with the traditional way of using external magnetic fields or spin currents [11], and has thus tremendous potential in future low-power and [ [51][52][53][54][55] (for details, see comprehensive review [10]).…”

Section: Introductionmentioning

confidence: 99%

“…It can provide a fast and extremely energy-efficient way for modulating magnetism compared with the traditional way of using external magnetic fields or spin currents [11], and has thus tremendous potential in future low-power and [ [51][52][53][54][55] (for details, see comprehensive review [10]). Compared with the strains which can normally be sustained throughout the heterostructure [5][6][7][8], such charge-driven ME effects can only occur at the heterointerface ranging from the first few atomic layers to several nanometres (normally less than 10 nm) depending on the charge screening length of a specific magnetic film [9,10]. As a result, such charge effects may become remarkable only when the thickness of the magnetic film and/or the heterostructure becomes small.…”

Section: Introductionmentioning

confidence: 99%

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Film size-dependent voltage-modulated magnetism in multiferroic heterostructures

Shu

et al. 2014

Phil. Trans. R. Soc. A.

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The electric-voltage-modulated magnetism in multiferroic heterostructures, also known as the converse magnetoelectric (ME) coupling, has drawn increasing research interest recently owing to its great potential applications in future low-power, high-speed electronic and/or spintronic devices, such as magnetic memory and computer logic. In this article, based on combined theoretical analysis and experimental demonstration, we investigate the film size dependence of such converse ME coupling in multiferroic magnetic/ferroelectric heterostructures, as well as exploring the interaction between two relating coupling mechanisms that are the interfacial strain and possibly the charge effects. We also briefly discuss some issues for the next step and describe new device prototypes that can be enabled by this technology.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Film size-dependent voltage-modulated magnetism in multiferroic heterostructures

Shu

et al. 2014

Phil. Trans. R. Soc. A.

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“…Composite materials such as laminates 124 or epitaxial heterostructures combine piezomagnetic (magnetostrictive) and piezoelectric materials that are elastically coupled via strain that is transmitted across the interface. The magnetoelectric coupling is the result of the combination of the magnetostrictive and piezoelectric properties of the individual phases, which are elastically coupled and are typically much larger than those found in single phase multiferroics.…”

Section: Composite Structuresmentioning

confidence: 99%

Multiferroic Materials: Physics and Properties

Palstra

Blake

2016

Reference Module in Materials Science and Materials Engineering

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Multiferroics are materials in which magnetism and ferroelectricity coexist. They are of fundamental interest to understand electronic behavior coupling magnetic interactions and electric dipolar order. Moreover, they are of applied interest because they allow various types of novel magnetic and electric device structures. We distinguish two important classes of multiferroic materials and discuss mechanisms and materials belonging to each class separately. In the first group of multiferroics, magnetization and polarization arise independently from each other. In the second category of multiferroics, ferroelectricity is induced by magnetic order, resulting in strong magnetoelectric coupling. We also briefly discuss multiferroic thin film heterostructures showing interfacial magnetoelectric coupling interactions with potential applications in memory devices

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“…Compared to single-phase multiferroics, multiferroic heterostructures comprised of ferromagnetic and ferroelectric layers are increasingly being explored as candidate materials utilized in magnetoelectric devices, because of their strong room-temperature magnetoelectric effects and flexibility for materials choices and device designs. 26 In multiferroic heterostructures, magnetoelectric effects also can rely on the coupling among more degrees of freedom, but across the interfaces of the ferromagnetic and ferroelectric phases. 27 Nevertheless, so far the exploitation of electric-field-induced strain to control the stability and transformation of magnetic polar states and vortex states in multiferroic composites has not yet been fully understood.…”

Section: Introductionmentioning

confidence: 99%

Phase diagrams of magnetic state transformations in multiferroic composites controlled by size, shape and interfacial coupling strain

et al. 2017

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This work aims to give a comprehensive view of magnetic state stability and transformations in PZT-film/FeGa-dot multiferroic composite systems due to the combining effects of size, shape and interfacial coupling strain. It is found that the stable magnetic state of the FeGa nanodots is not only a function of the size and shape of the nanodot but also strongly sensitive to the interfacial coupling strain modified by the polarization state of PZT film. In particular, due to the large magnetostriction of FeGa, the phase boundaries between different magnetic states (i.e., in-plane/out-of-plane polar states, and single-/multi-vortex states) of FeGa nanodots can be effectively tuned by the polarization-mediated strain. Fruitful strain-mediated transformation paths of magnetic states including those between states with different orderings (i.e., one is polar and the other is vortex), as well as those between states with the same ordering (i.e., both are polar or both are vortex) have been revealed in a comprehensive view. Our result sheds light on the potential of utilizing electric field to induce fruitful magnetic state transformation paths in multiferroic film-dot systems towards a development of novel magnetic random access memories.

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Recent Progress in Multiferroic Magnetoelectric Composites: from Bulk to Thin Films

Cited by 1,731 publications

References 256 publications

Film size-dependent voltage-modulated magnetism in multiferroic heterostructures

Film size-dependent voltage-modulated magnetism in multiferroic heterostructures

Multiferroic Materials: Physics and Properties

Phase diagrams of magnetic state transformations in multiferroic composites controlled by size, shape and interfacial coupling strain

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