| Issue |
Europhys. Lett.
Volume 63, Number 5, September 2003
|
|
|---|---|---|
| Page(s) | 757 - 763 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2003-00467-y | |
| Published online | 01 November 2003 | |
: A new narrow-band spin-gap material
1
Condensed Matter Science Division, Oak Ridge National Laboratory Oak Ridge, TN 37831-6393, USA
2
Institute for Solid State Physics, University of Tokyo 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
3
Department of Low Temperature Physics M. V. Lomonosov Moscow State University - Moscow 119899, Russia
Received:
14
April
2003
Accepted:
25
June
2003
A new spin-ladder family material is studied by
means of magnetic susceptibility, heat capacity and neutron
inelastic-scattering measurements on a powder sample. Singlet
ground state and finite spin-gap are confirmed by
thermal-activated–type susceptibility and by a distinct peak at
16
in spin excitation. A triple-narrow-band structure in
the spin excitation spectrum, probably due to the complex crystal
structure, is observed and the possibility of a weakly
interacting spin-cluster system is discussed.
PACS: 75.10.Pq – Spin chain models / 75.30.Ds – Spin waves / 75.30.Et – Exchange and superexchange interactions
© EDP Sciences, 2003
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