Volume 63, Number 5, September 2003
|Page(s)||757 - 763|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||01 November 2003|
: A new narrow-band spin-gap material
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
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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