Abstract
A quantum magnet, LiCuSbO 4, with chains of edge-sharing spin-12 CuO 6 octahedra is reported. While short-range order is observed for T<10K, no zero-field phase transition or spin freezing occurs down to 100mK. Specific heat indicates a distinct high-field phase near the 12T saturation field. Neutron scattering shows incommensurate spin correlations with q=(0.47±0.01)π/a and places an upper limit of 70μeV on any spin gap. Exact diagonalization of 16-spin easy-plane spin-12 chains with competing ferro- and antiferromagnetic interactions (J 1=-75K, J 2=34K) accounts for the T>2K data.
| Original language | English (US) |
|---|---|
| Article number | 187206 |
| Journal | Physical review letters |
| Volume | 108 |
| Issue number | 18 |
| DOIs | |
| State | Published - May 3 2012 |
All Science Journal Classification (ASJC) codes
- General Physics and Astronomy