Superparamagnetic materials are tiny magnetic particles that can be magnetized in the presence of a magnetic field but do not retain any magnetization once the field is removed. This behavior occurs because the particles are small enough that thermal energy can overcome their magnetic interactions, preventing them from becoming permanently magnetized. These materials are often used in applications like magnetic nanoparticles for drug delivery and data storage devices. Their unique properties allow for efficient manipulation and control in various technologies, making them valuable in fields such as biomedicine and electronics.