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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, NaTi Si2 O6 and TiOCl, each of which exhibits a spin gap at low temperature. From these we conclude that the spin gap in NaTi Si2 O6, which arises from orbital ordering at TOO =210 K, is temperature independent below 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 Tc1 =67 K. We can desc...

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Publication status:
Published

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Publisher copy:
10.1103/PhysRevB.75.094404

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Institution:
University of Oxford
Department:
Oxford, MPLS, Physics, Condensed Matter Physics
More by this author
Institution:
University of Oxford
Department:
Oxford, MPLS, Physics, Condensed Matter Physics, REF-Physics
Brooks, ML More by this author
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Journal:
PHYSICAL REVIEW B
Volume:
75
Issue:
9
Publication date:
2007-03-05
DOI:
EISSN:
1550-235X
ISSN:
1098-0121
URN:
uuid:2574f947-0973-43a3-980c-8ecf994667d9
Source identifiers:
27943
Local pid:
pubs:27943
Language:
English

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