Investigations of the magnetic phase state of Nd2Fe14B high-energy hard ferromagnets under the action of an explosive shock wave traveling across the magnetization vector, M, have been performed. We demonstrate that the transverse shock-wave compression of an Nd2Fe14B hard ferromagnet with pressure at the shock wave front of P = 22.3 GPa causes a hard ferromagnet — to — weak magnet phase transition. Due to this phase transition, the magnetostatic energy stored for an indefinite period of time in the Nd2Fe14B ferromagnet is released within a short time interval and can be transformed into pulsed primary power. Based on this effect we have developed a new type of ultracompact (volumes from 9 to 50 cm3) autonomous explosive-driven source of primary power that is capable of powering a magnetic flux compression generator with current up to 4 kA, and of charging high-voltage Arkadiev-Marx type generator capacitor banks.
S. I. Shkuratov et al., "Transverse Explosive Shock-Wave Compression of Nd₂Fe₁₄B High-Energy Hard Ferromagnets: Induced Magnetic Phase Transition," Proceedings of the 2005 Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter, American Institute of Physics (AIP), Jan 2006.
The definitive version is available at https://doi.org/10.1063/1.2263318
2005 Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter
Keywords and Phrases
High-Pressure Effects; Magnetic Transitions; Neodymium Compounds; Shock Wave Effects; Boron compounds; Ferromagnetic materials; Iron compounds
Article - Conference proceedings
© 2006 American Institute of Physics (AIP), All rights reserved.
01 Jan 2006