Current Status of Magnetoelectric Composite Thin/Thick Films
TLDR
A review of the current status of magnetoelectric (ME) multiferroics and ME composite thin/thick films can be found in this paper, where the authors introduced the aerosol deposition (AD) technique to overcome the thermal expansion mismatch between individual phases and the substrate.Abstract:
Here we review the current status of magnetoelectric (ME) multiferroics and ME composite thin/thick films. The magnitude of ME coupling in the composite systems is dependent upon the elastic coupling occurring at the interface of piezoelectric and magnetostrictive phases. The multiferroic ME films in comparison with bulk ME composites have some unique advantages and show higher magnitude of ME response. In ME composite films, thickness of the films is one of the important factors to have enough signal. However, most of all reported ME nanocomposite structured films in literature are limited in overall thickness which might be related to interface strain resulting from difference in thermal expansion mismatch between individual phases and the substrate. We introduced noble ME composite film fabrication technique, aerosol deposition (AD) to overcome these problems. The success in AD fabrication and characterization of ME composite films with various microstructure such as 3-2, 2-2 connectivity are discussed.read more
Citations
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Journal ArticleDOI
Electric field control of magnetism in multiferroic heterostructures
TL;DR: In this article, the authors review the recent developments in the electric field control of magnetism in multiferroic heterostructures, which consist of heterogeneous materials systems where a magnetoelectric coupling is engineered between magnetic and ferroelectric components.
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Electric field control of magnetism in multiferroic heterostructures
TL;DR: Charge transport phenomena in multiferroic heterostructures, where both magnetic and ferroelectric order parameters are used to control charge transport, suggest new possibilities to control the conduction paths of the electron spin, with potential for device applications.
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Artificial ferroic systems: novel functionality from structure, interactions and dynamics
TL;DR: This work focuses on artificial spin systems consisting of arrays of dipolar-coupled nanomagnets, which hold promise for new applications that involve electric field control of magnetism, or electric and magnetic field responsive devices for high frequency integrated circuit design in microwave and terahertz signal processing.
Journal ArticleDOI
Artificial multiferroic heterostructures
Carlos A. F. Vaz,Urs Staub +1 more
TL;DR: The electric field control of magnetism in the solid state has become a very active topic of research recently, made possible by the advances in the synthesis and fabrication of new materials and artificial heterostructures as discussed by the authors.
Journal ArticleDOI
Giant self-biased magnetoelectric coupling in co-fired textured layered composites
TL;DR: In this article, a co-fired magnetostrictive/piezoelectric/magnet-strictive laminate structure with silver inner electrode was synthesized and characterized.
References
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Journal ArticleDOI
Epitaxial BiFeO3 multiferroic thin film heterostructures.
Jian Wang,Jeffrey B. Neaton,Haimei Zheng,Valanoor Nagarajan,Satishchandra Ogale,B. T. Liu,Dwight Viehland,V. Vaithyanathan,Darrell G. Schlom,Umesh V. Waghmare,Nicola A. Spaldin,Karin M. Rabe,Manfred Wuttig,Ramamoorthy Ramesh +13 more
TL;DR: Enhanced polarization and related properties in heteroepitaxially constrained thin films of the ferroelectromagnet, BiFeO3, and combined functional responses in thin film form present an opportunity to create and implement thin film devices that actively couple the magnetic and ferroelectric order parameters.
Journal ArticleDOI
Revival of the Magnetoelectric Effect
Abstract: Recent research activities on the linear magnetoelectric (ME) effect?induction of magnetization by an electric field or of polarization by a magnetic field?are reviewed. Beginning with a brief summary of the history of the ME effect since its prediction in 1894, the paper focuses on the present revival of the effect. Two major sources for 'large' ME effects are identified. (i) In composite materials the ME effect is generated as a product property of a magnetostrictive and a piezoelectric compound. A linear ME polarization is induced by a weak ac magnetic field oscillating in the presence of a strong dc bias field. The ME effect is large if the ME coefficient coupling the magnetic and electric fields is large. Experiments on sintered granular composites and on laminated layers of the constituents as well as theories on the interaction between the constituents are described. In the vicinity of electromechanical resonances a ME voltage coefficient of up to 90?V?cm?1?Oe?1 is achieved, which exceeds the ME response of single-phase compounds by 3?5 orders of magnitude. Microwave devices, sensors, transducers and heterogeneous read/write devices are among the suggested technical implementations of the composite ME effect. (ii) In multiferroics the internal magnetic and/or electric fields are enhanced by the presence of multiple long-range ordering. The ME effect is strong enough to trigger magnetic or electrical phase transitions. ME effects in multiferroics are thus 'large' if the corresponding contribution to the free energy is large. Clamped ME switching of electrical and magnetic domains, ferroelectric reorientation induced by applied magnetic fields and induction of ferromagnetic ordering in applied electric fields were observed. Mechanisms favouring multiferroicity are summarized, and multiferroics in reduced dimensions are discussed. In addition to composites and multiferroics, novel and exotic manifestations of ME behaviour are investigated. This includes (i) optical second harmonic generation as a tool to study magnetic, electrical and ME properties in one setup and with access to domain structures; (ii) ME effects in colossal magnetoresistive manganites, superconductors and phosphates of the LiMPO4 type; (iii) the concept of the toroidal moment as manifestation of a ME dipole moment; (iv) pronounced ME effects in photonic crystals with a possibility of electromagnetic unidirectionality. The review concludes with a summary and an outlook to the future development of magnetoelectrics research.
Journal ArticleDOI
Multiferroics: progress and prospects in thin films.
TL;DR: Novel device paradigms based on magnetoelectric coupling are discussed, the key scientific challenges in the field are outlined, and high-quality thin-film multiferroics are reviewed.
Journal ArticleDOI
Multiferroic magnetoelectric composites: Historical perspective, status, and future directions
TL;DR: In this article, a review of mostly recent activities can be found, with a brief summary of the historical perspective of the multiferroic magnetoelectric composites since its appearance in 1972.
Journal ArticleDOI
Multiferroic BaTiO3-CoFe2O4 Nanostructures.
Haimei Zheng,Jian Wang,Samuel E. Lofland,Z. Ma,L. Mohaddes-Ardabili,T. Zhao,Lourdes Salamanca-Riba,S. R. Shinde,Satishchandra Ogale,Feiming Bai,Dwight Viehland,Y. Jia,Darrell G. Schlom,Manfred Wuttig,Alexander L. Roytburd,Ramamoorthy Ramesh +15 more
TL;DR: Thermodynamic analyses show that the magnetoelectric coupling in a nanostructured BaTiO3-CoFe2O4 ferroelectromagnet can be understood on the basis of the strong elastic interactions between the two phases.