Magnetic order in TbCo2Zn20 and TbFe2Zn20
| Title | Magnetic order in TbCo2Zn20 and TbFe2Zn20 |
| Publication Type | Journal Article |
| Year of Publication | 2010 |
| Authors | Tian W, Christianson AD, Zarestky JL, Jia S, Bud'ko SL, Canfield PC, Piccoli PMB, Schultz AJ |
| Journal Title | Physical Review B |
| Volume | 81 |
| Pages | 144409 |
| Date Published | 04/01 |
| ISBN Number | 1098-0121 |
| Accession Number | ISI:000277210200073 |
| Keywords | cecr2al20, co, RH, ru |
| Abstract | We report neutron diffraction studies of TbCo2Zn20 and TbFe2Zn20, two isostructural compounds which exhibit dramatically different magnetic behavior. In the case of TbCo2Zn20, magnetic Bragg peaks corresponding to antiferromagnetic order are observed below T-N approximate to 2.5 K with a propagation vector of (0.5 0.5 0.5). On the other hand, TbFe2Zn20 undergoes a ferromagnetic transition at temperatures as high as 66 K which shows a high sensitivity to sample-to-sample variations. Two samples of TbFe2Zn20 with the same nominal compositions but with substantially different magnetic ordering temperatures (T-c approximate to 51 and 66 K) were measured by single-crystal neutron diffraction. Structural refinements of the neutron diffraction data find no direct signature of atomic site disorder between the two TbFe2Zn20 samples except for subtle differences in the anisotropic thermal parameters. The differences in the anisotropic thermal parameters between the two samples are likely due to very small amounts of disorder. This provides further evidence for the extreme sensitivity of the magnetic properties of TbFe2Zn20 to small sample variations, even small amounts of disorder. |
| URL | <Go to ISI>://000277210200073 |
