Barkhausen
1.Acoustic Barkhausen Emission (ABE) and Electromagnetic Barkhausen Emission (EBE) have been measured.
2.The correlation between 300M steel surface stress and Barkhausen signal has been studied by applying four points bending and analyzed with the magnetostrictive model.
3.Biaxial stress of ferromagnetic materials and residual stress of welding components have been measured by using the relation between Barkhausen effeet based on the law of approach to saturation magnetization and internal stress.
4.It has been shown that, when the direction of stress parallels magnetizing direction, Barkhausen signal increases with the increasing of tensile stress, decreases with the increasing of compressive stress.
5.Their typical magnetic effects include magnetostriction effect, inverse magnetostriction effect, giant ΔE effect, giant Barkhausen effect,Matteucci effect, Hall effect, electromagnetic induction and magnetization-saturation related phenomenon, etc.
6.By the Bitter pattern technique and the energy analysis method, we systematically studied the character and variations of domain structures during the magnetization reversal process along the hard-axis direction of a 40 nm NiFe film stripe. It shows that the Barkhausen jumps in the element are the result of the irreversible domain processes, involving domain wall mergence, closure domain transitions, and wall-state transitions.
