Single-crystal neutron diffraction study of short-range magnetic correlations in Tb5Ge4
| Title | Single-crystal neutron diffraction study of short-range magnetic correlations in Tb5Ge4 |
| Publication Type | Journal Article |
| Year of Publication | 2009 |
| Authors | Tian W, Kreyssig A, Zarestky JL, Tan L, Nandi S, Goldman AI, Lograsso TA, Schlagel DL, Gschneidner KA, Pecharsky VK, McQueeney RJ |
| Journal Title | Physical Review B |
| Volume | 80 |
| Pages | 134422 |
| Date Published | 10/01 |
| ISBN Number | 1098-0121 |
| Accession Number | ISI:000271351300072 |
| Keywords | alloys, behavior, gd-5(si2ge2), refrigeration, system |
| Abstract | We present a single-crystal neutron diffraction study of the magnetic short-range correlations in Tb5Ge4 which orders antiferromagnetically below the Neel temperature T-N approximate to 92 K. Strong diffuse scattering arising from magnetic short-range correlations was observed in wide temperature ranges both below and above T-N. The antiferromagnetic ordering in Tb5Ge4 is described to consist of strongly coupled ferromagnetic block layers in the ac plane that stack along the b axis with weak antiferromagnetic interlayer coupling. Diffuse scattering was observed along both a* and b* directions indicating three-dimensional short-range correlations. Moreover, the q dependence of the diffuse scattering is Squared Lorentzian in form suggesting a strongly clustered magnetic state that may be related to the proposed Griffiths-like phase in Gd5Ge4. |
| URL | <Go to ISI>://000271351300072 |
| DOI | 10.1103/Physrevb.80.134422 |
