Rapid Formation of a Monolayer of Oriented Hard‐Magnetic Strontium Hexaferrite Nanoparticles on a Solid Substrate

Abstract

Abstract Single crystal nanoplatelets of M‐type strontium hexaferrite, which were prepared by oxide glass crystallization, form colloidal solutions after consequent leaching and peptization of the nanocrystalline material. The colloids are stabilized by the particles charging to a zeta‐potential of about 50 mV. Monolayers of oriented platelet strontium hexaferrite nanoparticles form readily on a glass surface while immersing the substrate in the colloidal solution due to Columb attraction of the positively charged nanoparticles to the negatively charged surface. The films show almost rectangular magnetization hysteresis loops typical for strongly textured hard‐magnetic material.