Muon Study of the Spin Dynamics in the Organic Spin-Peierls Compound MEM(TCNQ)2

Synthetic Metals 103, 2034 (1999)

Muon Study of the Spin Dynamics in the Organic Spin-Peierls Compound MEM(TCNQ)₂

B. W. Lovett¹, S. J. Blundell¹, Th. Jestädt¹, F. L. Pratt², M. Kurmoo³, S. Tagaki⁴ and W. Hayes¹
¹Clarendon Laboratory, Oxford University Department of Physics, Parks Road, Oxford OX1 3PU, United Kingdom
²RIKEN-RAL, ISIS, Rutherford Appleton Laboratory, Chilton Didcot, Oxon OX11 0QX, United Kingdom
³IPCMS. 23 rue du Loess, BP 20/CR, 67037 Strasbourg Cedex, France
⁴Department of Physics, Kyushu Institute of Technology, Tobata, Kitakyushu 804, Japan

Abstract. We report a muon spin relaxation study of the organic spin-Peierls system MEM(TCNQ)₂ over the temperature range 39 mK to 200 K. Our results show a crossover from Gaussian to exponential relaxation below the spin-Peierls transition temperature. We attribute this change to the effect of a dilute set of static electronic defect spins resulting from the majority of spins freezing into a non-magnetic spin singlet state.

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Thomas Jestädt, 1999. Back to publications.