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Magnetic properties of the spin-1 chain compound NiCl3C6H5CH2CH2NH3статья
- Авторы: Lipps F., Arkenbout A.H., Polyakov A., Günther M., Salikhov T., Vavilova E., Klauss H.H., Büchner B., Palstra T.M., Kataev V.
- Журнал: Low Temperature Physics
- Том: 43
- Номер: 11
- Год издания: 2017
- Издательство: AIP Publishing
- Местоположение издательства: United States
- Первая страница: 1298
- Последняя страница: 1304
- DOI: 10.1063/1.5010316
- Аннотация: 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.
- Добавил в систему: Вавилова Евгения Леонидовна