Hollow Magnetic Nanoparticles

Hollow magnetic nanoparticles present a characteristic morphology that gives rise to interesting magnetic behaviors and novel applications. In this chapter, we describe the synthesis methods utilizing the Kirkendall effectKirkendall effect and the magnetic properties of these nanoparticles, with a focus on the analysis of their enhanced surface anisotropySurface anisotropy, spin disorderSpin disorder, and exchange biasExchange bias effect. The experimental studies are complemented by atomistic Monte Carlo simulationsMonte Carlo Simulations. Finally, we review a variety of applications of these nanoparticles, especially in biomedicineBiomedicine, batteries, sensing, and data storageData storage, and also discuss some of the limitations that need to be overcome for their implementation.