OVERVIEW OF APPLICATIONS OF MICROMAGNETIC BARKHAUSEN EMISSIONS AS NONINVASIVE MATERIAL CHARACTERIZATION TECHNIQUE

In this concise overview, the physical principles of magnetic Barkhaus en effect will be briefly discussed and its recent applications in mat erial characterization will be considered. There are new trends in mic romagnetic Barkhausen effect emissions and its applications in the mat erial characterization area. These emissions take place in magnetic ma terials subjected to changing applied magnetic field, and can be used, for instance, to study noninvasively surface characterization of mate rials. Since these emissions are quite sensitive to changes in the mic rostructure and subsurface stress states in magnetic materials, variou s applications of these of micromagnetic emissions have been found in areas such as nuclear, aerospace, and automotive technologies which us e magnetic materials.