... in the 1980s. It has a combination of very high remanence and coercivity, and comes with a wide ... such as ceramic, Alnico and Sm-Co to achieve high efficiency, low cost and more compact devices. 1. ... found wide application in.Acoustics: speakers, microphone.Transportation: automobile, Motor Assemblies.Electronics: Sensors, Instrumentation, Transducer.Electrical Engineering: Generator, Windmill ...