Ultra-small magnetic structures will be fabricated using both conventional nano-lithography techniques (e-beam and scanned probe lithographies) and chemical synthetic techniques. The systems studied may include molecular nanomagnets (e.g., Mn-12), carbon nanotubes grown on magnetic nanoparticles, patterned longitudinal and perpendicular media, and nano-devices. The goal of this research will be to understand the physics of ultrasmall magnetic structures, their implications for the limits of magnetic data storage, and to develop novel nanoscale devices. The magnetization and switching processes will be studied as a function of size, shape, and temperature to characterize thermally activated and quantum mechanical tunneling transitions. The high-frequency properties (1 GHz to 150 GHz) will be studied using high-frequency electron spin resonance, ferromagnetic resonance, and transport properties. The molecular nanomagnets and magnetic nanostructures will be incorporated into thin-film device structures to explore potential device applications.
Carbon nanotubes; Electron spin resonance; Ferromagnetic resonance; MN-12; Molecular nanomagnets; Nanomagnetism;