Mitroova, Z. and Mihalik, M. and Zentko, A. and Bokor, Mónika Zsuzsanna and Kamarás, Katalin (2005) Synthesis, structural and magnetic properties of TM22+[MOIV(CN)(8)]center dot nH(2)O. CERAMICS-SILIKATY, 49 (3). pp. 181-187. ISSN 0862-5468
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Abstract
Octacyanomolybdates (OCMs) TM2 divided by[Mo(CN)(8)]center dot nHO, where TM is Mn, Fe, Co, Ni, Cu were synthesised and characterised by IR spectroscopy and UV-VIS spectroscopy. The UV-VIS spectrum showed the intervalence charge transfer (IVCT) band between Mo-IV-CN-Cu-II and Mo-V-CN-Cu-I around 510 nm. Studied OCMs adopt tetragonal crystal structure. The H-1 NMR signals reflect the magnetic moment of the TM2- ions (mu(P)). The decay rates of free induction decay (FID) signals increase as pp and the applied static rf-field increases. The spin-lattice relaxation times at 27.7 MHz vary from 0.0187 ins (Mn) up to 0.45 ms (Cu). Magnetization measurements indicate long-range magnetic ordering of Mn- and Co- OCMs with the Curie temperature T-c = 4 K. The remaining OCMs (TM is Fe, Ni, Cu) are paramagnetic down to T = 1.9 K.
Item Type: | Article |
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Subjects: | Q Science / természettudomány > QC Physics / fizika T Technology / alkalmazott, műszaki tudományok > T2 Technology (General) / műszaki tudományok általában |
SWORD Depositor: | MTMT SWORD |
Depositing User: | MTMT SWORD |
Date Deposited: | 30 Jul 2013 10:31 |
Last Modified: | 30 Jul 2013 10:31 |
URI: | http://real.mtak.hu/id/eprint/6065 |
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