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Magnetic nanostructures have attracted a great deal of attention during the last decade because of their prospective applications not only in microwave absorption, high density recording media, and biosensor applications but also in functional micro and nanodevices [1-4]. Recently, significant investigations have been motivated to get excess of 1Tbit/in2 in magnetic storage devices but at smaller...
Magnetic field sensors utilizing tunneling magnetoresistance (TMR) effect often consists of two ferromagnetic layers with orthogonal anisotropy in a tunnel magnetoresistance structure [1]. In this report, we extend the study to a perpendicular magnetic anisotropic Ta/CoFeB/MgO/CoFeB/Ta junction with ferromagnetic-superparamagnetic pairs and introduce a new type magnetic field sensor. Because the magnetoresistance...
Developing high frequency soft magnetic thin films is still a hot issue due to the requirement of the technology in high frequency field. Traditionally, tuning the high frequency performance of magnetic thin films is realized by tuning the in-plane uniaxial anisotropy field of magnetic thin films with amorphous or nanocrystalline structure. There are several methods to obtain the in-plane uniaxial...
In perpendicular magnetic anisotropy (PMA) multilayers electrode system, the low spin polarization and large lattice mismatch between traditional PMA electrodes ([Co/Pt]n, [Co/Pd]n) and spin-filter barrier MgO make it difficult to obtain large tunneling magneto-resistance (TMR) ratio [1]. One of several possible solutions is to insert a magnetic electrode between MgO barrier and PMA multilayers electrodes,...
Coils for pulsed magnets in the range of 50-75 T are developed with optimized combinations of conductors and reinforcement for the prototype laboratory of the Wuhan High Magnetic Field Center (WHMFC). The basic design tool is a Pulsed Magnet Design Software package (PMDS) for calculating the capacitor discharge, conductor heating, mechanical stresses and the residual stress, including plastic deformation...
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