Abstract
Magnetic-susceptibility measurement of a new Laves-phase cubic system, YbxIn1-xCu2 (0.30x0.65), exhibit very sharp Yb2Yb3+ valence phase transitions at temperatures Tv=4080 K. A simple valence-fluctuation model predicts first-order phase transitions and agrees with the experimental observations. For Yb0.4In0.6Cu2 the theoretical fit shows that below Tv=46 K, the 6 state of Yb3+ is 190 K above Yb2+, changing abruptly to -210 K above Tv. The present compounds exhibit the sharpest temperature-dependent valence phase transition in any metallic system.
| Original language | English |
|---|---|
| Pages (from-to) | 617-619 |
| Number of pages | 3 |
| Journal | Physical Review B |
| Volume | 33 |
| Issue number | 1 |
| DOIs | |
| State | Published - 1986 |