Sara Majetich-Dept of Physics - Carnegie Mellon University

Sara Majetich

Professor, Physics

Office: Wean Hall 6404
Phone: 412-268-3105
Fax: 412-681-0648


Ph.D., University of Georgia


My research focuses on magnetic nanoparticles that have very uniform sizes, and we study their fundamental behavior, as well as possible applications in data storage media, permanent magnets, and biomedicine. One of the consequences of this monodispersity is that the particles can then self-assemble into arrays (shown below), just as atoms come together to form a crystal. We are investigating the collective behavior of the nanoparticle arrays that are analogous to those in crystals. Isolated iron atoms do not interact with each other and are paramagnetic, but in an iron crystal the interactions lead to ferromagnetism. Superparamagnetic-to-ferromagnetic and insulator-to-metal phase transitions are expected as the nanoparticles are brought closer together. We have also developed a method to replace the surfactant coating the particles with an inorganic matrix, and are exploring methods that exploit this approach to prepare functional nanocomposites.

More details about current research projects, current group members, and financial support can be found at the Majetich group home page:

Selected Publications