Lorentz microscopy was applied to the observation of magnetic domains in iron-gallium (Fe–Ga) alloys. Results did not show any link between the magnetic domains and the magnetostriction enhancement by Ga addition, but did reveal that the drastic decrease in magnetostriction for Fe–31.2 at. % Ga was due to the presence of large scale precipitates. Magnetic domain features did not change in the a...

To progress the proficiency and broaden action bandwidth of vibration energy harvesters, this paper presents a cantilever piezoelectric-magnetostrictive bistable hybrid harvester with dynamic magnifier. The energy-harvesting system comprises two degrees freedom electrical freedom. It consists composite beam made three layers, in which magnetostrictive piezoelectric layers are attached to top bo...

The magnetic phase diagram in a single crystal of copper metaborate CuB2O4 in a magnetic field parallel to a tetragonal axis c has been investigated. From the resonant, magnetic and magnetostrictive data the phase diagram of CuB2O4 on a plane “temperature magnetic field” is constructed. The magnetic incommensuratecommensurate phase transition is caused by the saturation of weak subsystem of cop...

Magnetoacoustic emission (MAE) is a phenomenon where acoustic noise is generated due to the motion of non-180 ° magnetic domain walls in a ferromagnet with non-zero magnetostrictive constants. MAE has been studied extensively for many years [1-5] and has even been applied as an NDE tool for characterizing the heat treatment of high-yield low carbon steels [6-8]. A complete theory which fully ac...