We analyze the micromagnetics of short longitudinal modulations a high-magnetization material in cylindrical nanowires made soft-magnetic lower magnetization such as permalloy, combining magnetic microscopy, analytical modeling, and micromagnetic simulations. The mismatch induces curling around axis modulations, an attempt to screen interfacial charges. angle increases with modulation length, u...

Magnetic properties such as coercivity, remanence and saturation magnetization will determine the area enclosed by hysteresis loop of a magnetic material, which also represents heating. Nanowarming cryopreserved organs is new application for heating using nanoparticles. In this paper, isolated Ni MNW different sizes shapes are studied via micromagnetic simulation to explore optimization individ...

Last year's Nobel Prize in Physics has showcased the vibrant research on magnetic nanostructures. Such artificially structured materials often exhibit novel and tunable properties as their physical dimensions become comparable to certain characteristic length scales. In this talk I will illustrate a variety of custom-designed magnetic nanostructures and highlight our recent studies of the magne...

Novel one-dimensional (1D) nanostructures of rare earth complexes (europium methacrylate (Eu(MA)(3))) have been prepared from the precursor of irregularly shaped Eu(MA)(3) powder in ethanol solvent without the assistance of an added surfactant, catalyst, or template. These hexagonal-shaped complex nanowires have diameters of about 100-300 nm and lengths ranging from tens to hundreds of micromet...

High-resolution magnetic imaging is of utmost importance to understand magnetism at the nanoscale. In the present work, we use a magnetic force microscope (MFM) operating under in-plane magnetic field in order to observe with high accuracy the domain configuration changes in Co nanowires as a function of the externally applied magnetic field. The main result is the quantitative evaluation of th...

Nanoelectromechanical systems (NEMS) based on nanomaterials, especially NEMS resonators made of suspended nanowires, nanotubes or nanosheets have emerged as promising devices for many sensing applications. However, operation of such NEMS resonators in liquids is usually difficult due to strong viscous damping. Here we present our progress in developing NEMS devices based on suspended nanomateri...