Transverse shock wave demagnetization of Nd 2Fe 14B high-energy hard ferromagnetics

Sergey I. Shkuratov, Evgueni F. Talantsev, James C. Dickens, Magne Kristiansen

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The action of transverse shock waves (the shock wave propagates across the magnetization vector M) on the magnetic phase state of a Nd 2Fe 14B high-energy hard ferromagnetic was investigated experimentally. The design of the ferromagnetic sample, which was made as a hollow cylinder, has made it possible to dramatically reduce the amount of the explosive that initiates a transverse shock wave in Nd 2Fe 14B to 1.0 g (for Nd 2Fe 14B samples weighing 67.5 g). The results of the experiment have shown that the transverse shock wave propagating through Nd 2Fe 14B causes "hard ferromagnetic-to- paramagnetic" phase transformation terminating by practically complete demagnetization of Nd 2Fe 14B. Pulse generators based on the transverse shock wave demagnetization of hollow cylindrical Nd 2Fe 14B samples with diameter of 25.4 mm and length of 19.1 mm are capable of producing high-voltage pulses [peak voltage of 11.3 kV, full width at half maximum (FWHM) of 4.5 μs] and high-current pulses (peak current of 1.93 kA, FWHM of 100 μs, peak power of 27.0 kW). The effect of transverse shock wave demagnetization of high-energy hard ferromagnetic, Nd 2Fe 14B, was detected.

Original languageEnglish
Pages (from-to)159-162
Number of pages4
JournalJournal of Applied Physics
Issue number1
StatePublished - Jul 1 2002


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