Volume 63, Number 3, August 2003
|Page(s)||374 - 380|
|Section||Condensed matter: structure, mechanical and thermal properties|
|Published online||01 November 2003|
Evidence for the coexistence of low-dimensional magnetism and long-range order in
Institut für Festkörperphysik, Technische Universität Dresden 01062 Dresden, Germany
2 Mineralogisch-Petrologisches Institut, Universität Bonn - 53115 Bonn, Germany
3 Tata Institute of Fundamental Research - Homi Bhabha Road, Mumbai-400 005, India
Accepted: 5 June 2003
We report the results of neutron powder diffraction studies on the spin-chain compound in the temperature range from 3 to 293. Bragg peaks due to magnetic ordering start appearing below about 100. The most interesting observation is that there is a diffuse magnetic peak superimposed over the strongest magnetic Bragg peak. The diffuse magnetic intensity is observed below as well as above 100. This finding provides a new insight into the physics of this compound as though the low-dimensional magnetic interaction coexists with long-range magnetic order —a novel situation among quasi–one-dimensional oxides.
PACS: 61.12.Ld – Neutron diffraction / 75.25.+z – Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source X-ray scattering, etc.) / 75.40.-s – Critical-point effects, specific heats, short-range order
© EDP Sciences, 2003
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