Abstract
The material KCuF3 is a prototypical example of a weakly coupled S = 1/2 Heisenberg antiferromagnetic chain system. The inter-chain coupling leads to anti ferromagnetic order at low temperatures. In the ordered state theory predicts that the low-energy spin dynamics exhibits an unusual gapped longitudinal mode. Here we report polarized inelastic scattering measurements of the excitations in KCuF3. A weak magnetic field is utilized to prepare a single domain state with the spins aligned in the scattering plane but perpendicular to the chain direction. This configuration enables a clean measurement of the longitudinal magnetic response as spin-flip scattering. (C) 2004 Elsevier B.V. All rights reserved.
| Original language | English |
|---|---|
| Pages (from-to) | 56-59 |
| Number of pages | 4 |
| Journal | Physica B : Condensed Matter |
| Volume | 356 |
| Issue number | 1-4 |
| DOIs | |
| Publication status | Published - 15 Feb 2005 |
Keywords
- quantum magnets
- longitudinal modes
- low dimensional
- CHAIN COMPOUND KCUF3
- MAGNETIC EXCITATIONS
- SPIN DYNAMICS
- FIELD
- DIFFRACTION
- CONTINUUM
- SPECTRUM
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