Determination of magnetic structure in Mn2-Nb(CN)8 molecular magnet
The aim of the project is determination of magnetic structure in molecular material [Mn(H2O)2]2[Nb(CN)8].4H2O (1), the outbound system of the family of compounds showing interesting functionalities. 1 is a soft ferrimagnet with Mn (S=5/2) and Nb (s=1/2) sublattices and Tc of 47 K. Experiment no. 5-31-2284, performed at D20 for the partially deuterized sample, revealed, aside from 1 (s.g.: I 4/m), the presence of the parasitic phase 2 (s.g.: P 21/c). The phase 2 has not been discovered with XRD performed before the ND experiment, because of peaks overlap of 1 and 2. The reason for appearance of the secondary phase 2 was most probably heavy water used for the synthesis of the deuterized sample. We would like to repeat the experiment for the new, non-deuterized powder sample, synthesized according to the verified procedure using H2O. As shown in experiment 5-31-2284, in spite of large incoherent background, the crystallinity of the material ensures good quality of ND data. We would like to obtain patterns at T = 300 K and 2 K (2*4 hours) and at 10 K, 20 K, 30 K, 40 K, 50 K, 150 K (ca. 12 hours). We apply for 1 day at D20, lambda = 2.4 Å.
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BALANDA Maria; BUDZIAK Andrzej and Thomas C. Hansen. (2015). Determination of magnetic structure in Mn2-Nb(CN)8 molecular magnet. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-31-2382
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