نتایج جستجو برای: paramagnetic materials
تعداد نتایج: 445890 فیلتر نتایج به سال:
is negative in diamagnetic materials and positive in paramagnetic materials. This means that the field and NMR frequency are both typically reduced in diamagnetic materials and enhanced in paramagnetic materials (though in calculating it is important to take account of the effect of the sample shape and the sphere of Lorentz). Paramagnetic/diamagnetic materials are attracted/repelled by a m...
nanoparticles of mn0.5zn0.5-xcdxfe2o4 with x varying from x = 0.0 to 0.3 were prepared by wet chemical co-precipitation method. the structural and magnetic properties were studied by using x-ray diffraction (xrd), scanning electron microscope (sem), transmission electron microscopy (tem) and electron paramagnetic resonance (epr) technique. the lattice constant increases with increase in cd cont...
In this review we will focus on how magnetic fields can be used to manipulate the motion of various micro- and nanostructures in solution. We will distinguish between ferromagnetic, paramagnetic and diamagnetic materials. Furthermore, the use of various kinds of magnetic fields, such as homogeneous, inhomogeneous and rotating magnetic fields, is discussed. To date most research has focused on t...
The Carr-Purcell-Meiboom-Gill (CPMG) sequence is commonly used in high resolution NMR spectroscopy and in magnetic resonance imaging for the measurement of transverse relaxation in systems that are subject to diffusion in internal or external gradients and is superior to the Hahn echo measurement, which is more sensitive to diffusion effects. Similarly, it can potentially be used to study dynam...
Li-ion batteries are invaluable for portable electronics and vehicle electrification. A better knowledge of compositional variations within the electrodes during battery operation is, however, still needed to keep improving their performance. Although essential in the medical field, magnetic resonance imaging of solid paramagnetic battery materials is challenging due to the short lifetime of th...
This manuscript describes the fabrication and manipulation of millimeter-scale spheres fabricated from ionotropic hydrogels that are crosslinked with paramagnetic metal ions (e.g., Ho(3+)). These ionotropic hydrogels experience a force in a magnetic field gradient that correlates with the concentration of the paramagnetic cations crosslinking the polymer. In an externally applied magnetic field...
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