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LETTER TO THE EDITOR

Spin dynamics in the organic spin - Peierls system MEM(TCNQ) studied using muon-spin relaxation

S J Blundell et al 1997 J. Phys.: Condens. Matter 9 L119-L124   doi: 10.1088/0953-8984/9/9/002  Help

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S J Blundell-+, F L Pratt-+, P A Pattenden-+, M Kurmoo++, K H Chow-+, S Takagi§, Th Jestädt-+ and W Hayes-+
-+ University of Oxford, Department of Physics, Clarendon Laboratory, Parks Road, Oxford OX1 3PU, UK
++ IPCMS, 23, rue du Loess, BP 20/CR, 67037 Strasbourg, France
§ Department of Physics, Kyushu Institute of Technology, Tobata, Kitakyushu 804, Japan

Abstract. We report the first muon-spin relaxation study of an organic spin - Peierls system, the linear-chain compound MEM(TCNQ). Our results show a crossover from a Gaussian relaxation to an exponential relaxation as the temperature is lowered below the spin - Peierls transition. We associate this behaviour with the slowing down of the electronic fluctuations resulting from the opening of a gap in the magnetic excitation spectrum.

Print publication: Issue 9 (3 March 1997)
Received 9 January 1997

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