EventDetails

Speaker:
Hari Srikanth, University of South Florida, USA

Magnetic nanoparticles have been building blocks in applications ranging from high
density recording to spintronics and] nanomedicine. Magnetic anisotropies in
nanoparticles arising from surfaces, shapes and interfaces in hybrid structures are
important in determining the functional response in various applications. In this talk
I will first introduce the basic aspects of anisotropy and discuss resonant RF
transverse susceptibility, that we have used extensively, as a powerful method to
probe the effective anisotropy in magnetic materials. Tuning anisotropy has a direct
impact on the performance of functional magnetic nanoparticles in biomedical
applications such as contrast enhancement in MRI and magnetic hyperthermia
cancer therapy. I will focus on the role of tuning surface and interfacial anisotropy
with a goal to enhance specific absorption rate (SAR) or heating efficiency.
Strategies going beyond simple spherical structures such as exchange coupled
core-shell nanoparticles, nanowire, nanotube geometries can be exploited to
increase heating efficiency in magnetic hyperthermia. In addition to biomedical
applications, composites of anisotropic nanoparticles dispersed in polymers pave
the way to a range of electrically and magnetically tunable materials for RF and
microwave device applications. This lecture will combine insights into fundamental
physics of magnetic nanostructures along with recent research advances in their
application in nanomedicine and electromagnetic devices.