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Electrical characterization of electro-Ceramics
Published in Amit Sachdeva, Pramod Kumar Singh, Hee Woo Rhee, Composite Materials, 2021
Multiferroic materials are multifunctional and exhibit more than one ferroic property such as ferromagnetism, ferroelectricity, ferrotoroidicity, and ferroelasticity. Various approaches are considered to syndicate the above ferroic properties in single-phase system [35]. However, to explain the ferroelectricity in multiferroic materials the three basic mechanisms are:It is induced by spin orders (antiferromagnetic in E phase and spiral), which affect the spatial inversion symmetry of the systemIt originates from the states of charge orderedSystems are ferrotoroidic.
Magnetic Properties of Perovskite Oxides
Published in Gibin George, Sivasankara Rao Ede, Zhiping Luo, Fundamentals of Perovskite Oxides, 2020
Gibin George, Sivasankara Rao Ede, Zhiping Luo
A material is said to be multiferroic when they exhibit two or more ferroic phases (magnetic, electric, or piezo-elastic) simultaneously. These materials switch their internal structure from one phase to another under the influence of an external specific motive force in a certain direction. This possible cross-coupling between electric polarization–electric field–strain, magnetization–magnetic field–strain, and stress-strain–electric polarization–magnetization is graphically illustrated in Figure 5.20. In multiferroics, the electric and magnetic phases represent any type of ferroic ordering, including ferromagnetic, antiferromagnetic, ferrimagnetic, paramagnetic, superparamagnetic, and their electrical equivalents. Multiferroics, in general, are promising materials for magnetic field sensors, data storage, photovoltaic, thermal energy harvesting, and solid-state cooling (Vopson 2015).
Magnetic and Electrical Properties
Published in Elaine A. Moore, Lesley E. Smart, Solid State Chemistry, 2020
Elaine A. Moore, Lesley E. Smart
Multiferroics are materials that possess two or more cooperative properties, such as ferromagnetism, ferroelectricity, and ferroelasticity. In practice, it is generally used to refer to materials that are ferroelectric and ferromagnetic or antiferromagnetic. The interest in these materials stems from the possibility of applying a magnetic field to alter the charge or applying a voltage to change the spin. Possible applications include computer memory that can be laid down electrically but read magnetically, and electronic devices with 4-state logic. When writing to memory using ferroelectrics, charged plates are placed on either side of the ferroelectric material, making the atoms move up or down and giving a 0 or 1 as with magnetic memory. Writing using an electric field rather than a magnetic field has advantages, including using less energy. Reading back using electric fields results in the memory being wiped. However, if changing the polarisation changes the magnetic state, then the memory can be read by detecting the magnetism, a process that is nondestructive. Other possible applications include magnetic sensors and energy harvesting.
Mathematical problems of dynamical interaction of fluids and multiferroic solids
Published in Applicable Analysis, 2023
George Chkadua, David Natroshvili
The surge of interest in multiferroic materials over the past two decades has been driven by their fascinating physical properties and huge potential for technological applications. Multiferroics belong to a newer class of thermo-electro-magneto-elastic materials in which ferromagnetic and ferroelectric properties occur simultaneously. Consequently, mathematical modelling related to multiferroic complex composite structures and the corresponding fluid-solid interaction problems became very important from the theoretical and practical points of view. This type of interaction problems mathematically are described by non-standard boundary-transmission problems for different dimensional physical fields acting in adjacent domains. Similar interaction problems involving different dimensional physical fields appear in mathematical models of electro-magneto transducers, sensors, actuators, energy harvesters, servomechanisms, phased array microphones, ultrasound equipment, inkjet droplet actuators, sonar transducers, bioimaging, immunochemistry, and acousto-biotherapeutics (see, e.g. Neugschwandtner et al. [1], Safari et al. [2], Vopson [3] and the references therein).
Crafting the multiferroic BiFeO3-CoFe2O4 nanocomposite for next-generation devices: A review
Published in Materials and Manufacturing Processes, 2021
Tahta Amrillah, Angga Hermawan, Chandrawati Putri Wulandari, Aisyah Dewi Muthi’Ah, Firman Mangasa Simanjuntak
Multiferroic material possesses multiple characteristics of ferroic properties that attracted extensive research interest and developments for many applications.[1,2] Various types of multiferroics were discovered depending upon its magnetic–electric interaction mechanisms; lone-pair-active multiferroics, geometric ferroelectricity, charge ordering, magnetically-driven ferroelectricity, f-electron magnetism, and multiferroic composites. Particularly for multiferroic composites, this material possesses large magnetoelectric properties compared to other types of multiferroic. In general, a multiferroic nanocomposite is a combination of two materials having strong magnetic and electric properties that lead to strong magnetoelectric coupling.[3] A large number of material combinations have been discovered having unique magnetoelectric couplings mechanisms, such as strain-, charge-, and exchange bias-mediated modulations.[4–7] This material was predicted to have multiple properties, which can be exploited for many applications, such as magnetic sensors and actuators, storage devices, and energy harvesting devices.[4–6]
Elastic and attenuation behavior of the Bi1-x Re x FeO3 (x = 0 & 0.1; Re = La, Pr, Nd & Sm) multiferroic system
Published in Phase Transitions, 2021
Elle Sagar, K. Vijaya Kumar, P. Venugopal Reddy
The materials possessing at least two out of the three well-known ferroic orders viz., ferroelectric, ferromagnetic or ferroelastic are called multiferroics. Due to their potential applications, such as information storage devices, electronic devices and sensors in a variety of multifunctional devices, these materials have drawn the attention of the scientific community. The magnetic or electric fields can manipulate both spin and charge, which will be allowed by the interaction between the magnetic and electronic degrees of freedom [1,2]. Among the family of multiferroic materials, BiFeO3 (BFO), with a distorted perovskite (ABO3) and rhombohedral crystal structure with R-3c space group, has attracted the attention of researchers due to its ability to exhibit both ferromagnetic (G-type antiferromagnetic) and ferroelectric properties above room temperature [3,4]. In fact, the bulk BFO shows multiferroic properties with high ferroelectric transition temperature (1100 K) and weak AFM Neel temperature (643 K) [5]. Due to the interesting properties and non-toxic nature of this multiferroic material, it can replace well-known PZT in ferroelectric memory applications.