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Muon-spin relaxation measurements on the dimerized spin-1/2 chains NaTiSi2O6 and TiOCl

Abstract:

We report muon spin relaxation (μSR) and magnetic susceptibility investigations of two Ti3+ (S=1/2) chain compounds, NaTiSi2O6 and TiOCl, each of which exhibits a spin gap at low temperature. From these we conclude that the spin gap in NaTiSi2O6, which arises from orbital ordering at Too, with a value of 2Δ =700(100) K. In TiOCl, we find thermally activated spin fluctuations corresponding to a spin gap 2Δ=440(60) K below Tcl=67 K. We can describe both the μSR and susceptibility data in terms ...

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Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1103/PhysRevB.75.094404

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Institution:
University of Oxford
Research group:
Correlated Electron Systems
Department:
Mathematical,Physical & Life Sciences Division - Physics - Condensed Matter Physics
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Institution:
University of Oxford
Research group:
Correlated Electron Systems
Oxford college:
Mansfield College
Department:
Mathematical,Physical & Life Sciences Division - Physics - Condensed Matter Physics
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Institution:
ISIS Muon Facility, ISIS, Chilton, UK
More by this author
Institution:
University of Oxford
Research group:
Correlated Electron Systems
Oxford college:
St Catherine's College
Department:
Mathematical,Physical & Life Sciences Division - Physics - Condensed Matter Physics
More by this author
Institution:
University of Oxford
Research group:
Correlated Electron Systems
Department:
Mathematical,Physical & Life Sciences Division - Physics - Condensed Matter Physics
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Publisher:
American Physical Society Publisher's website
Journal:
Physical Review B Journal website
Volume:
75
Issue:
9
Pages:
Article: 094404
Publication date:
2007-03-05
DOI:
EISSN:
1550-235x
ISSN:
1098-0121
URN:
uuid:07d87e4d-d670-4a2c-9586-545fd5f076a0
Local pid:
ora:2209

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