NMR Evidence for Antiferromagnetic Transition in the Single-Component Molecular System, [Cu(tmdt)${}_2$]

Abstract

The magnetic state of the single-component molecular compound, [Cu(tmdt)${}_2$], is investigated by means of ${}^1$H-NMR. An abrupt spectral broadening below 13 K and a sharp peak in nuclear spin-lattice relaxation rate, $T_1^{-1}$, 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 $0.22-0.45$ ${\mu }_{\mathrm{B}}$/molecule. The temperature-dependence of $T_1^{-1}$ 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.

arXiv comment13pages, 5 figures

References in corpus (5)

• NMR relaxation in half-integer antiferromagnetic spin chains
• Study of one-dimensional nature of (Sr,Ba)_2Cu(PO_4)_2 and BaCuP_2O_7 via 31P NMR
• NMR relaxation rates for the spin-1/2 Heisenberg chain
• Single-Component Molecular Metals as Multiband π-d Systems
• NMR Evidence for Antiferromagnetic Transition in the Single-Component Molecular Conductor, [Au(tmdt)_{2}] at 110 K

Cited by in corpus (4)

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• Single-component molecular material hosting antiferromagnetic and spin-gapped Mott subsystems
• A spin-gapped Mott insulator with the dimeric arrangement of twisted molecules Zn(tmdt)${}_2$