Magnetic phenomena in Co-containing layered double hydroxides

Magnetic phenomena in Co-containing layered double hydroxides

Vieira, D.E.L. ; Salak, A.N. ; Fedorchenko, A.V. ; Pashkevich, Y.G. ; Fertman, E.L. ; Desnenko, V.A. ; Babkin, R.Y. ; Čižmár, E. ; Feher, A. ; Lopes, A.B. ; Ferreira, M.G.S.

Тема: Low dimensionality and inhomogeneity effects in quantum matter

Інший ID: PACS: 61.43.Gt, 75.50.Lk, 75.70.Cn

URI: http://dspace.nbuv.gov.ua/handle/123456789/175128

Посилання: Magnetic phenomena in Co-containing layered double hydroxides / D.E.L. Vieira, A.N. Salak, A.V. Fedorchenko, Y.G. Pashkevich, E.L. Fertman, V.A. Desnenko, R.Y. Babkin, E. Čižmár, A. Feher, A.B. Lopes, M.G.S. Ferreira // Физика низких температур. — 2017. — Т. 43, № 8. — С. 1214-1218. — Бібліогр.: 17 назв. — англ.

Підтримка: This paper is dedicated to Professor Viktor Valentinovich Eremenko on the occasion of his 85th anniversary. A. Feher, Y. Pashkevich, E. Fertman, V. Desnenko, A. Fedorchenko, are very thankful to Professor Eremenko for decades of fruitful collaboration. Viktor Valentinovich was and remains an excellent mentor in Magnetism for the whole Košice Low Temperature Group. The work was supported by project TUMOCS. This project has received funding from the European Union's Horizon 2020 research and innovation program under the Marie Skłodowska-Curie grant Agreement No. 645660. The financial supports of the Slovak Research and Development Agency under Contract Nos. APVV-14-0073 and APVV-0132-11, and the supports of P2020 COMPETE and FCT-Portugal through project POCI-01-0145-FEDER-016686—PTDC/CTM-NAN/2418/2014 (NANOCONCOR) are gratefully acknowledged as well.

Дата: 2017

Завантажень: 191

Magnetic phenomena in Co-containing layered double hydroxides

Анотація:

Magnetic behavior of CoII(n)AlIII layered double hydroxides (LDHs) (n = Co/Al = 2 and 3) intercalated with nitrate was studied as a function of temperature. Both LDH compounds are paramagnetic above about 8 K. A rapid increase of their magnetic moments occurs below this temperature until the moments reach the maximum values at Tmax of 4.0 K and 3.2 K for Co(2)Al–NO₃ and Co(3)Al–NO₃, respectively. Below Tmax, the zero-field-cooled and the field-cooled static magnetization curves are strongly different. Along with this low-temperature phenomena, Co(2)Al–NO₃ and Co(3)Al–NO₃ demonstrate anomalous behavior of their temperature dependence magnetic susceptibility in a higher-temperature range: between 75 and 175 K, both the paramagnetic Curie temperature and the effective magnetic moment change in a non-monotonous way. Possible structural reasons of the observed magnetic behavior of the CoII(n)AlIII LDHs are discussed.

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