Annealing effects on the coercivity of SmCo5 nanoparticles

摘要: The enhanced coercivity of ball milled nanoparticles SmCo5 has been attributed to the reduced particle size, but milling process introduces additional strain which can also affect coercivity. Here effects size and are decoupled from each other using a combination x-ray diffraction, electron microscopy, measurements. Ball were annealed under different temperature, time, atmospheric conditions minimize without chemically altering sample, with minimal grain growth sintering. X-ray diffraction was used determine if phase changes had occurred, monitor average strain. From scanning microscopy log-normal distributions found no evidence sintering revealed. sample coercivities measured by superconducting quantum interference device following annealing.