Magnetic properties of the spin-1 chain compound NiCl3C6H5CH2CH2NH3

F. Lipps, A.H. Arkenbout, A. Polyakov, M. Günther, T. Salikhov, E. Vavilova, H.-H. Klauss, B. Büchner, T.M. Palstra, V. Kataev

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Abstract

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 isotropic and 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 co-existent mesoscopically spatially separated AFM ordered and spin-singlet state regions similar to the situation observed before in some spin-diluted Haldane magnets.

Original languageEnglish
Pages (from-to)1298-1304
Number of pages7
JournalLow Temperature Physics
Volume43
Issue number11
DOIs
Publication statusE-pub ahead of print/First online - 29 Jan 2018
Externally publishedYes

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