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Ferrites with hexagonal crystal symmetry have received much scientific and technological attention in their centimeter-/or even millimeter- (mm-) wave applications, since the hexagonal crystal symmetry leading to high magnetocrystalline anisotropy energies and subsequently high ferromagnetic resonance frequencies, among the most popular microwave hexaferrites are those derived from the M-type barium...
Multiferroic composites with combined ferromagnetic (FM) and ferroelectric (FE) phases have attracted extensive attention due to their strong magnetoelectric (ME) coupling at room temperature [1-4]. Specifically in magnetic-piezoelectric heterostructures, the voltage applied to the piezoelectric layer produces a mechanical deformation that couples to the magnetic layer, and thus induces a change in...
Sendust alloy (Fe-Si-Al) flaky particles were used as microwave absorbing material because of its excellent soft magnetic properties such as high saturation magnetization, high permeability, low magnetocrystalline anisotropy, and nearly zero magnetostriction.[1] The structure of FeSiAl alloy is similar to that of FeAl alloy; O. Ikeda etc.[2] studied the transformation among A2, B2 and DO3 structures...
Magnetic vortices are characterized by the sense of in-plane magnetization circulation and by the polarity of the vortex core. Due to the combination of controlled chirality and polarity, magnetic vortices have attracted scientific interest for their potential application as multibit memory cells. However, to obtain the stable ground state, the confined geometries of the vortex structures define a...
In the processing fabrication of MTJ stacks, the Neel and magnetostatic coupling induce a strong interlayer coupling field along the hard-axis direction, and the utilization of the magnetic bias field along the easy-axis direction makes the response of MTJ nonlinear. In this paper, we researched the influence of the interlayer coupling field and permanent bias field on the linearity of MTJ magnetic...
Multiferroic heterostrcture composed of ferromagnetic and ferroelectric phase has recently attracted ever-increasing amount of interest due to its strong magnetoelectric coupling at room temperature [1-3]. In particular, the strain-mediated magnetoelectric (ME) coupling arising from the combined piezoelectric and magnetoelastic effect has shown a large modification of the magnetic anisotropy of the...
Magnetoelectric (ME) couplings in multiferroic composites exhibiting simultaneous ferromagnetic and ferroelectric phases through strain-mediated interactions have attracted great interests for their promising technological applications on magnetic sensors, energy-harvesting devices, four-state memories and microwave resonators[1, 2]. Initially, the research on magnetoelectric materials focuses on...
In this paper, we demonstrate a novel type of contrast agent with multiplexing capability for use in magnetic resonance imaging (MRI) applications. Keeping biocompatibility in mind, iron and several iron oxide thin films with varying magnetic properties were prepared and characterized using a superconducting quantum interference device (SQUID). Double-disk shaped particles constructed with iron and...
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