NMR Evidence for Antiferromagnetic Transition in the Single-Component Molecular System, [Cu(tmdt)2]
نویسندگان
چکیده
The magnetic state of the single-component molecular compound, [Cu(tmdt)2], is investigated by means of H-NMR. An abrupt spectral broadening below 13 K and a sharp peak in nuclear spin-lattice relaxation rate, T 1 , at 13 K are observed as clear manifestations of a second-order antiferromagnetic transition, which is consistent with the previously reported magnetic susceptibility and EPR measurement. The ordered moment is estimated at 0.22− 0.45 μB/molecule. The temperature-dependence of T 1 above the transition temperature indicates one-dimensional spin dynamics and supports that the spins are on the central part of the molecule differently from other isostructural compounds. PACS numbers: 76.60.-k, 71.20.Rv, 75.50.Xx
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