Magnetic phenomena in Co-containing layered double hydroxides
authors Vieira, DEL; Salak, AN; Fedorchenko, AV; Pashkevich, YG; Fertman, EL; Desnenko, VA; Babkin, RY; Cizmar, E; Feher, A; Lopes, AB; Ferreira, MGS
nationality International
journal LOW TEMPERATURE PHYSICS
keywords X-RAY-DIFFRACTION; INTERCALATION; AL
abstract Magnetic behavior of Co-II(n)Al-III 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 8K. A rapid increase of their magnetic moments occurs below this temperature until the moments reach the maximum values at T-max of 4.0 K and 3.2 K for Co(2)Al-NO3 and Co(3)Al-NO3, respectively. Below T-max, 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 Co-II(n)Al-III LDHs are discussed. Published by AIP Publishing.
publisher AMER INST PHYSICS
issn 1063-777X
isbn 1090-6517
year published 2017
volume 43
issue 8
beginning page 977
ending page 981
digital object identifier (doi) 10.1063/1.5001299
web of science category Physics, Applied
subject category Physics
unique article identifier WOS:000412369500016
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