TITLE

Longitudinal-shock-wave compression of Nd[sub 2]Fe[sub 14]B high-energy hard ferromagnet: The pressure-induced magnetic phase transition

AUTHOR(S)
Shkuratov, Sergey I.; Talantsev, Evgueni F.; Dickens, James C.; Kristiansen, Magne; Baird, Jason
PUB. DATE
February 2003
SOURCE
Applied Physics Letters;2/24/2003, Vol. 82 Issue 8, p1248
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A study of a magnetic phase state of Nd[SUB2]Fe[SUB14]B 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 Nd[SUB2]Fe[SUB14]B at 28-38 GPa causes a magnetic phase transition terminated by practically complete demagnetization of Nd[SUB2]Fe[SUB14]B. Due to this phase transition all electromagnetic energy stored in Nd[SUB2]Fe[SUB14]B 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 ms).
ACCESSION #
9140742

 

Related Articles

  • Thin-film magnetic patterns in an external field. Bryant, Paul; Suhl, Harry // Applied Physics Letters;5/29/1989, Vol. 54 Issue 22, p2224 

    The behavior of ideally soft ferromagnetic films in the presence of a weak coplanar magnetic field is explored by the method of characteristics. Solutions are found which have no internal field or in some cases have field-free zones. Results are specifically given for circular and elliptic...

  • Heating of magnons by hot charge carriers and electrical properties of HgCr[sub 2]Se[sub 4]. Solin, N. I.; Samokhvalov, A. A.; Naumov, S. V. // Physics of the Solid State;Apr97, Vol. 39 Issue 4, p580 

    Strong variations of the conductivity and the Hall coefficient as a function of the magnetic and electric field strengths are discovered in the ferromagnetic semiconductor HgCr[sub 2]Se[sub 4]. The nature of these phenomena is discussed in connection with its electronic structure and the strong...

  • Anomalous Surface Deceleration of a Domain Wall in an Amorphous Ferromagnet. Zubov, V. E.; Kudakov, A. D.; Fedulova, T. S. // JETP Letters;1/10/2000, Vol. 71 Issue 1, p21 

    On soft magnetic amorphous specimens, a rapid decrease in the surface amplitude of 180� domain wall oscillations relative to the bulk amplitude is observed with increasing frequency of the magnetizing field. The dynamics of the domain wall is studied by a magnetooptical method at the...

  • Theory of Exchange Coupling in Disordered Magnetic Multilayers. Zyuzin, A. Yu. // JETP Letters;10/25/2002, Vol. 76 Issue 8, p495 

    We consider a mechamism of exchange coupling based on interaction between electrons in a nonmagnetic layer. Depending on the ratio of inverse time of diffusion of electrons between ferromagnetic layers and ferromagnetic splitting of conducting electrons, this mechanism describes the transition...

  • Spiral Vortices in Ferromagnets. Borisov, A. B. // JETP Letters;3/10/2001, Vol. 73 Issue 5, p242 

    New types of magnetic defects in two-dimensional ferromagnets are found in the exchange approximation, and the influence of magnetic anisotropy on their structure is analyzed. � 2001 MAIK �Nauka / Interperiodica�.

  • Interface roughness effects in the giant magnetoresistance in magnetic multilayers. Barnas, J.; Palasantzas, G. // Journal of Applied Physics;10/15/1997, Vol. 82 Issue 8, p3950 

    Analyzes in-plane electronic transport in thin layered magnetic structures composed of two ferromagnetic films separated by a nonmagnetic spacer. Role of interface roughness in the giant magnetoresistance; Application of self-affine interfaces described by the k-correlation model.

  • Coercivity enhancement above the Ne´el temperature of an antiferromagnet/ferromagnet bilayer. Leighton, C.; Suhl, H.; Pechan, Michael J.; Compton, R.; Nogue´s, J.; Schuller, Ivan K. // Journal of Applied Physics;8/1/2002, Vol. 92 Issue 3, p1483 

    Single-crystal thin films of the antiferromagnet FeF[sub 2] have been used to exchange bias overlayers of Fe. An unexpected coercivity enhancement is observed at temperatures above the Néel temperature of the FeF[sub 2]. This coercivity reaches a peak value of over 600 Oe close to the Néel...

  • Spiral-Logarithmic Structures in a Heisenberg Ferromagnet. Gutshabash, E. Sh. // JETP Letters;3/25/2001, Vol. 73 Issue 6, p279 

    Spiral-logarithmic structure is suggested as a stationary solution of a modified equation for the Heisenberg model, and the single- and N-soliton solutions are constructed on this base. � 2001 MAIK �Nauka / Interperiodica�.

  • Remanent States of Small Ferromagnetic Cylinder. Ternovsky, V.; Luk’yanchuk, B.; Wang, J. P. // JETP Letters;6/25/2001, Vol. 73 Issue 12, p661 

    The internal magnetic structures of a cylinder are computed without prior assumption of axial symmetry. A three-dimensional magnetostatic solution is presented. A detailed distribution of the magnetization is obtained through numerical integration of the Landau–Lifshitz equation with the...

  • A New Class of Nodal Stationary States in a 2D Heisenberg Ferromagnet. Bostrem, I. G.; Ovchinnikov, A. S. // JETP Letters;12/25/2002, Vol. 76 Issue 12, p716 

    A new class of nodal topological excitations in a 2D Heisenberg model is studied. The solutions correspond to a nodal singular point of the gradient field of the azimuthal angle. An analytical solution is found for the isotropic case. The effect of in-plane exchange anisotropy is studied...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics