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Soft-magnetic amorphous alloys based on the ferromagnetic elements Fe, Co, Ni and their combination have attracted increasing interests since the discovery of the Fe-P-C system in 1967, because of their excellent soft-magnetic performances including high saturation flux density (Bs), low coercivity (Hc), high permeability, low core loss, and so on. By devoting subsequent great efforts, a variety of...
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...
Soft magnetic metal powders, such as Fe-Si-Al-Cr alloys or nanocrystalline metal alloys, have attracted considerable attention for shielding against electromagnetic interference (EMI) radiation. [1].
General Motors Corporation which is the first companyused the rapid quenching technique to prepare the NdFeB powder whit the nanocrystalline structure. Now, the single roller melt-spinning methodwhich is widely used to prepare the NdFeB powderhas become one of the research hot spots of magnetic materials today.
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...
Arrays of double-disk structured particles were fabricated with ferromagnetic iron disks separated by nonmagnetic polyimide spacers, to be used as multispectral contrast agents for magnetic resonance imaging (MRI). The advantages of using this contrast agent, compared to currently existing agents, include geometrically dependent spectral signatures, diffusion driven signal amplification, and potentials...
Semiconducting ??-FeSi2 material has many potential applications in advanced electronic and optoelectronic devices. In this work, we report for the first time the synthesis of crystalline ??-FeSi2 via high-temperature and high-pressure reaction of Si and Fe powders. The XRD and Raman scattering results confirm the formation of ??-FeSi2. The HRTEM images show the existence of two kinds of lattice fringes...
This paper reports on magnetic properties of bulk polycrystalline samples of ln2O3 doped with a wide range of TM ions. Phase purity of the samples was analyzed by means of X-ray diffraction and conductivity was also measured using a four-probe technique. From magnetization-temperature curves (M-T curves), it was shown that Cr doped samples was found to be paramagnetic throughout the whole temperature...
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