Magnetic properties of the spin-1 chain compound NiCl3C6H5CH2CH2NH3

• Published in: Low temperature physics (Woodbury, N.Y.) N.Y.), 2017-11, Vol.43 (11), p.1298-1304
• Main Authors: Lipps, F., Arkenbout, A. H., Polyakov, A., Günther, M., Salikhov, T., Vavilova, E., Klauss, H.-H., Büchner, B., Palstra, T. M., Kataev, V.
• Format: Article
• Language: English
• Subjects: Antiferromagnetism; Chains; Couplings; Crystallography; Ground state; Magnetic permeability; Magnetic properties; Magnets; Nickel compounds; NMR; Nuclear magnetic resonance; Temperature dependence
• ISSN: 1063-777X; 1090-6517
• DOI: 10.1063/1.5010316

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.