Spin-wave dispersion in magnetostrictive Fe-Ga alloys: Inelastic neutron scattering measurements

TitleSpin-wave dispersion in magnetostrictive Fe-Ga alloys: Inelastic neutron scattering measurements
Publication TypeJournal Article
Year of Publication2007
AuthorsZarestky JL, Moze O, Lynn JW, Chen Y, Lograsso TA, Schlagel DL
Journal TitlePhysical Review B
Volume75
Pages052406
Date PublishedFeb
Type of ArticleArticle
ISBN Number1098-0121
Accession NumberISI:000244532600012
Keywordsalloys, BCC FE, CRYSTALS, IRON-GALLIUM ALLOYS, LATTICE-PARAMETERS, MAGNETIC EXCITATIONS, magnetoelasticity, MARTENSITE, point, si
Abstract

Fe-Ga alloys of appropriate Ga concentration and heat treatment show a very large enhancement in the tetragonal magnetostriction over that of pure alpha-Fe [lambda(100)(Fe-Ga)similar to 15 lambda(100)(Fe)]. In order to gain further understanding of the extraordinary magnetoelastic characteristics of this system, the spin dynamics of two of these alloys, Fe1-xGax (x=0.160 and 0.225), were studied using inelastic neutron scattering techniques. The correlation of the spin-wave dispersion curve with the lattice constant and atomic radii of solute is examined for this and other Fe alloys.

DOI10.1103/PhysRevB.75.052406
Alternate JournalPhys. Rev. B