Abstract
Most of the unusual low-T properties of Yb4As3, including a large specific-heat coefficient C(T)/T ≃ 200 mJ/K2mol, result from the one-dimensional S = 1/2 antiferromagnetism caused by the formation of Yb3+ chains below the charge-ordering transition. On the other hand, large C(T)/T values for non-charge ordered Yb4(As0.36Sb0.64)3 and (Yb0.87Lu0.13)4As3 have also been reported. In order to clarify similarities and differences in the low-T specific heat between the 64% Sb- and 13% Lu-doped systems and pure Yb4As3, measurements down to 0.06 K in magnetic fields up to 10 T have been performed. The experiments reveal spin-glass freezing around 0.1 and 0.4 K for Yb4(As0.36Sb0.64)3 and (Yb0.87Lu0.13)4As3, respectively, that also affects their thermodynamic properties at higher temperatures.
Original language | English |
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Pages (from-to) | 370-372 |
Number of pages | 3 |
Journal | Physica B: Condensed Matter |
Volume | 312-313 |
DOIs | |
Publication status | Published - 2002 Mar 1 |
Event | International Conference on Strongly Correlated Electrons - Ann Arbor, MI, United States Duration: 2002 Aug 6 → 2002 Aug 6 |
Keywords
- Specific heat
- Spin glass
- YbAs
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering