Magnetic properties of the spin-1 chain compound NiCl₃C6H5CH₂CH₂NH₃

• Veröffentlicht in: Физика низких температур
• Datum: 2018
• Hauptverfasser: Lipps, F., Arkenbout, A.H., Polyakov, A., Günther, M., Salikhov, T., Vavilova, E., Klauss, H.H., Büchner, B., Palstra, T.M., Kataev, V.
• Format: Artikel
• Sprache: English
• Veröffentlicht: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2018
• Schlagworte: Специальный выпуск К 80-летию со дня рождения А.И. Звягина
• Online Zugang: https://nasplib.isofts.kiev.ua/handle/123456789/176231
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Zitieren: 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, and V. Kataev // Физика низких температур. — 2018. — Т. 44, № 11. — С. 1626-1633. — Бібліогр.: 28 назв. — англ.

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.