Multiferroic magnetoelectric (ME) composites are attractive materials for various electrically and magnetically cross-coupled devices. Many studies have been conducted on fundamental understanding, fabrication processes, and applications of ME composite material systems in the last four decades which has brought the technology closer to realization in practical devices. In this article, we present a review of ME composite materials and some notable potential applications based upon their properties. A brief summary is presented on the parameters that influence the performance of ME composites, their coupling structures, fabrications processes, characterization techniques, and perspectives on direct (magnetic to electric) and converse (electric to magnetic) ME devices. Overall, the research on ME composite systems has brought us closer to their deployment.

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Status and Perspectives of Multiferroic Magnetoelectric Composite Materials and Applications

Giant heterogeneous magnetostriction in Fe–Ga alloys: Effect of trace element doping

Abstract Self-biased magnetoelectric (ME) composites, defined as materials that enable large ME coupling under external AC magnetic field in the absence of DC magnetic field, are an interesting, challenging and practical field of research. In comparison to the conventional ME composites, eliminating the need of DC magnetic bias provides great potential towards device miniaturization and development of components for electronics and medical applications. In this review, the current state-of-the-art of the different self-biased structures, their working mechanisms, as well as their main characteristics are summarized. Further, the nature and requirement of the self-biased magnetoelectric response is discussed with respect to the specific applications. Lastly, the remaining challenges as well as future perspective of this research field are discussed.

Self-Biased Magnetoelectric Composites: An Overview and Future Perspectives

Interaction of Trace Rare‐Earth Dopants and Nanoheterogeneities Induces Giant Magnetostriction in Fe‐Ga Alloys

Thermally driven large magnetoresistance and magnetostriction in multifunctional magnetic FeGa–Tb alloys

We present the effects of terbium additives upon the microstructure and magnetic properties of Fe83Ga17Tbx alloys (x = 0, 0.2, 0.4, 0.6, and 0.8), prepared by vacuum electric arc-melting and directional solidification techniques. Experiments indicate that small amounts of terbium more than double the saturation magnetostriction of a [110] textured Fe83Ga17 alloy with λ = 72 × 10−6 and lower the magnetostriction saturation field. The pronounced increase in magnetostriction stems from the appearance of [100] texture in polycrystalline alloys. It is verified that [110] and [100] textures are enhanced by the introduction of terbium atoms preferentially residing in a Tb-rich intergranular phase.

Giant enhancement in the magnetostrictive effect of FeGa alloys doped with low levels of terbium

Influences of rare earth element Ce-doping and melt-spinning on microstructure and magnetostriction of Fe83Ga17 alloy

Three quasi-one-dimensional magnetoelectric (ME) magnetic field sensors, each with a different magnetostrictive wire material, were investigated in terms of sensitivity and noise floor. Magnetostrictive Galfenol, iron-cobalt-vanadium, and iron-nickel wires were examined. Sensitivity profiles, hysteresis effects, and noise floor measurements for both optimally biased and zero-biased conditions are presented. The FeNi wire (FN) exhibits high sensitivity (5.36 mV/Oe) at bias fields below 22 Oe and an optimal bias of 10 Oe, whereas FeGa wire (FG) exhibits higher sensitivity (6.89 mW/Oe) at bias fields >22 Oe. The sensor of FeCoV wire (FC) presents relatively low sensitivity (2.12 mV/Oe), due to low magnetostrictive coefficient. Each ME tube-topology sensor demonstrates relatively high sensitivity at zero bias field, which results from a magnetic shape anisotropy and internal strain of the thin magnetostrictive wire.

Effects of intrinsic magnetostriction on tube-topology magnetoelectric sensors with high magnetic field sensitivity

The invention relates to an iron-based magnetostrictive alloy wire and a production method thereof The molecular formula of the alloy is Fe1-x-yMxNyREz, M is one or more of Ga, In, Cr, Ni and Co, N is one or more of Al, Mn, V, Nb, Ti and Zr, RE is one or more of La, Ce, Pr, Nb, Tb, Dy, Y and Sc, wherein x is equal to 15 percent to 60 percent, y is equal to 0 percent to 10 percent, z is equal to 0 to 10, and the rest is Fe The technical point is as follows: according to the alloy composition requirement, an ingot casting is smelted, hammer cogging is carried out, and after a wire rod with the diameter of 8mm is rolled, the wire rod is cold-drawn into the alloy wire The size of the alloy wire produced by the method can be adjusted within a wide range, consequently, a sensor can be conveniently designed, and the magnetostrictive material can be used in more fields The magnetostriction coefficient of the iron-based magnetostrictive material can reach 367ppm under a 4000Oe applied magnetic field

production method of iron-based magnetostrictive alloy wire

The invention relates to a FeGa-RE magnetostrictive material and manufacturing technique. The characteristics of magnetostrictive material are that: the ingredient of material consists of Fe, Ga and RE, the content of Ga is 10-40at%, the content of RE is 0.01-20at%, the content of additional intermingle is: C=200-600ppm,N=200-600ppm,O=200-700ppm,other is Fe, the optimal value of Ga is 12-28at%, FeGa-RE magnetostrictive material, the ingredient of material adds one or more kinds of La, Ce, Pr, Nd, Tb, Dy whose content is 0.01-20at%. The manufacturing technique includes the alloy with purified material is cast as the needed round bar, and the alloy bar is crystallized by high temperature gradient flash freezing method and Bridgman method.

Shuangxia Wu

Papers

Giant enhancement in the magnetostrictive effect of FeGa alloys doped with low levels of terbium

Influences of rare earth element Ce-doping and melt-spinning on microstructure and magnetostriction of Fe83Ga17 alloy

Effects of intrinsic magnetostriction on tube-topology magnetoelectric sensors with high magnetic field sensitivity

production method of iron-based magnetostrictive alloy wire

A FeGa-RE magnetic-driven flexible materials and its making technology