Sara A. Majetich is an American physicist and Professor of Physics at Carnegie Mellon University.
[2] After earning her doctorate Majetich moved to Cornell University, where she worked as postdoctoral research associate.
[3] She made use of magnetic transmission electron microscopy (Lorentz microscopy)[4] to study the collective behaviour of magnetic nanoparticles, and showed that structural disorder disrupts self-assembly into ordered domains and can result in spin-glass dynamics.
[5] As nanoparticles assembly into ordered arrays various phase transitions can be expected, such as superparamagnetic to ferromagnetic and insulator to metal.
[7] This process involves argon-ion milling to transfer the pattern of metal oxide nanoparticles into oriented, multi-layer thin films and magnetic tunnel junctions.