How Does the Size of Nanoparticles Affect Ferromagnetism?
The size of nanoparticles plays a critical role in determining their magnetic properties. As the particle size decreases, the surface-to-volume ratio increases, which can significantly alter the magnetic behavior. For instance, below a certain critical size, ferromagnetic materials may transition to superparamagnetic behavior. This transition is essential because it prevents the agglomeration of particles, which is advantageous for medical applications where non-agglomerated particles are needed for efficient targeting and delivery.
