Abstract
A low-temperature ESR investigation is performed on a low-dimensional compound NH4CuCl3 with magnetization plateaux. In the phase below the 1/4-plateau, a coexistence of gapped two triplets and a gap-less mode is found. Below 1.3 K at which a part of spins show some magnetic ordering, the higher energy triplet mode exhibit no change. In addition to the previously reported gapped modes at 1/4- and 3/4- plateaux, a new low energy mode is found at the half of the saturation field. This mode may be caused by an 'irrelevant instability' of 1/2-plateau.
Original language | English |
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Pages (from-to) | 701-702 |
Number of pages | 2 |
Journal | Physica B: Condensed Matter |
Volume | 329-333 |
Issue number | II |
DOIs | |
Publication status | Published - May 2003 |
Keywords
- Electron spin resonance
- High magnetic field
- Magnetization plateau
- Spin gap