Physica B: Condensed Matter, Vol. 289-290 (1-4) (2000) pp.
145-148
© 2000 Elsevier Science B.V. All rights reserved.
PII:
S0921-4526(00)00300-8
Very low-temperature muon relaxation in an organic spin-Peierls
compound
B.W. Lovett a
*
b.lovett1@physics.ox.ac.uk,
S.J. Blundell a,
F.L. Pratt a,b,
Th. Jestädt a,
W. Hayes a,
S. Tagaki c
and M. Kurmoo d
a Department of Physics, Clarendon Laboratory, University
of Oxford, Parks Road, Oxford, OX1 3PU, UK
b
RIKEN-RAL, Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX,
UK
c Department of Physics, Kyushu Institute of
Technology, Tobata, Kitakyushu 804, Japan
d
IPCMS, 23 rue du Loess, BP 20/CR, 67037 Strasbourg Cedex, France
Abstract
We have observed strong muon-spin relaxation (µSR) in the spin-Peierls compound
MEM(TCNQ)2 at temperatures down to 39 mK. We attribute this
relaxation to the creation of defect spins by the muon. Furthermore, we observe
a slowing down of spin fluctuations as the spin-Peierls energy gap opens, and we
relate this effect to the size of the energy gap.
Keywords:
Spin-Peierls; Polaron; Relaxation
*Corresponding author. Fax: +44-1865-272-400
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2000, Elsevier Science, All rights reserved.