Physical Review Letters
Thayer School of Engineering
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=2π(h±1/n,k±1/n,l±1/n)/a0, where (h,k,l) and a0 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.
Noakes DR, Arrott AS, Belk MG, Deevi SC, Huang QZ, Lynn JW, Shull RD, Wu D. Incommensurate spin density waves in iron aluminides. Phys Rev Lett. 2003 Nov 21;91(21):217201. doi: 10.1103/PhysRevLett.91.217201. Epub 2003 Nov 18. PMID: 14683331.
Dartmouth Digital Commons Citation
Noakes, D. R.; Arrott, A. S.; Belk, M. G.; and Deevi, S. C., "Incommensurate Spin Density Waves in Iron Aluminides" (2003). Dartmouth Scholarship. 2858.