Incommensurate Spin Density Waves in Iron Aluminides
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 pare...
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| Veröffentlicht in: | Physical review letters 2003-11, Vol.91 (21), p.217201-217201, Article 217201 |
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| creator | Noakes, D R Arrott, A S Belk, M G Deevi, S C Huang, Q Z Lynn, J W Shull, R D Wu, D |
| description | 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. |
| doi_str_mv | 10.1103/physrevlett.91.217201 |
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| title | Incommensurate Spin Density Waves in Iron Aluminides |
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