Fizika Nizkikh Temperatur: Volume 43, Number 11 (November 2017), p. 0-0    ( to contents , go back )

Magnetic properties of the spin-1 chain compound NiCl3C6H5CH2CH2NH3

F. Lipps1, A.H. Arkenbout2, A. Polyakov2, M. Günther3, T. Salikhov4, E. Vavilova4, H.-H. Klauss3, B. Büchner1,3, T.M. Palstra2, and V. Kataev1

1Leibniz Institute for Solid State and Materials Research IFW Dresden, D-01171 Dresden, Germany

2Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands

3Institut für Festkörperphysik, TU Dresden, D-01069 Dresden, Germany
4Kazan E.K. Zavoisky Physical Technical Institute of RAS, 420029 Kazan, Russia

Received June 1, 2017


We report experimental results of the static magnetization, ESR and NMR spectroscopic measurements of the Ni-hybrid compound NiCl3C6H5CH2CH2NH3. In this material NiCl3 octahedra are structurally arranged in chains along the crystallographic a axis. According to the static susceptibility and ESR data Ni2+ spins S = 1 are isotropicand are coupled antiferromagnetically (AFM) along the chain with the exchange constant J = 25.5 K. These are important prerequisites for the realization of the so-called Haldane spin-1 chain with the spin-singlet ground state and a quantum spin gap. However, experimental results evidence AFM order at TN ≈ 10 K presumably due to small interchain couplings. Interestingly, frequency-, magnetic field-, and temperature-dependent ESR measurements, as well as the NMR data, reveal signatures which could presumably indicate an inhomogeneous ground state of coexistent mesoscopically spatially separated AFM ordered and spin-singlet state regions similar to the situation observed before in some spin-diluted Haldane magnets.

PACS: 76.30.–v Electron paramagnetic resonance and relaxation;
PACS: 76.60.–k Nuclear magnetic resonance and relaxation;
PACS: 75.10.Pq Spin chain models;
PACS: 75.50.Ee Antiferromagnetics.

Key words: ESR, NMR, spin chains.

Published online: September 25, 2017

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