Longitudinal-shock-wave compression of $Nd2Fe14B$ high-energy hard ferromagnet: The pressure-induced magnetic phase transition Available to Purchase

A study of a magnetic phase state of $Nd2Fe14B$ high-energy hard ferromagnets subjected to longitudinal-shock-wave compression (where the shock wave propagates along magnetization vector M) has been performed. The results of the investigation show that longitudinal-shock-wave compression of $Nd2Fe14B$ at 28–38 GPa causes a magnetic phase transition terminated by practically complete demagnetization of $Nd2Fe14B.$ Due to this phase transition all electromagnetic energy stored in $Nd2Fe14B$ is released and can be transformed into pulsed power. Explosive-driven autonomous sources of primary power utilizing this effect are capable of producing high-current pulses [current amplitude of 1.0 kA, full width at half maximum (FWHM) of 165 μs] and high-voltage pulses (peak voltage of 13.4 kV, FWHM of 8.2 μs).