ACTA

Spin-Peierls Transition in (N-Me-Tetra-Me-Pz)(TCNQ)₂

M. Kajňaková^a, M. Botko^a, V. A. Starodub^b, E. Čižmár^a and A. Feher^a
^aInstitute of Physics, Faculty of Sciences, P. J. Šafárik University, Park Angelinum 9, 041 54 Košice, Slovakia
^bInstitute of Chemistry, Jan Kochanowski University of Humanities and Sciences, Świętokrzyska 5G, 25-406 Kielce, Poland

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The new organic anion-radical salt (N-Me-Tetra-Me-Pz)(TCNQ)₂, (Pz = pyrazine) was studied as a low dimensional magnetic system. Heat capacity and EPR studies were performed in the temperature range from 2 to 300 K. The magnetic susceptibility was measured in the temperature range from 2 to 300 K and in magnetic fields of 100 mT and 1 T. The magnetic properties of this new system can be described as a dimerized Heisenberg spin S=1/2 chain possessing a spin-Peierls transition at 42 K.

DOI: 10.12693/APhysPolA.126.254
PACS numbers: 64.60.i, 75.10.Jm, 75.50.Xx, 76.30.v