title: Incommensurate spin density waves in iron aluminides.
abstract: Neutron diffraction in Fe(Al) reveals incommensurate spin density waves (SDWs) in alloys known to be spin glasses. The wave vectors for crystals of Fe(34Al), Fe(40Al), and Fe(43Al) show n varying from 11 to 6 for q-->=2pi(h+/-1/n,k+/-1/n,l+/-1/n)/a(0), where (h,k,l) and a(0) characterize the parent bcc lattice of the CsCl structure. The magnetic reflections are present far above the spin-glass freezing temperatures. These SDWs keep the spins on nearest-neighbor Fe atoms close to parallel, in contrast with SDWs in Cr, which keep nearest-neighbor spins close to antiparallel.
authors.affiliation: Center for Interactive Micromagnetics, Virginia State University, Petersburg, Virginia 23806, USA.
authors.forename: D R
authors.initials: DR
authors.lastname: Noakes
authors.forename: A S
authors.initials: AS
authors.lastname: Arrott
authors.forename: M G
authors.initials: MG
authors.lastname: Belk
authors.forename: S C
authors.initials: SC
authors.lastname: Deevi
authors.forename: Q Z
authors.initials: QZ
authors.lastname: Huang
authors.forename: J W
authors.initials: JW
authors.lastname: Lynn
authors.forename: R D
authors.initials: RD
authors.lastname: Shull
authors.forename: D
authors.initials: D
authors.lastname: Wu