ACTA

Magnetic Properties of Transition Metal Molybdates

P. Konieczny^a, R. Pełka^a, M. Grzesiak-Nowak^b, A. Szymańska^b, W. Łasocha^b,c, T. Wasiutyński^a
^aDepartment of Structural Research, Institute of Nuclear Physics, Polish Academy of Science, Radzikowskiego 152, 31-342 Kraków, Poland
^bXRD and Thermoanalysis Laboratory, Jerzy Haber Institute of Catalysis and Surface Chemistry Polish Academy of Science, Niezapominajek 8, 30-239 Kraków, Poland
^c Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Kraków, Poland

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Two examples of transition metal molybdates were studied with the use of X-ray diffraction and DC magnetometry techniques. First compound, copper dimolybdate trihydrate CuMo₂O₇·3H₂O contains 2D layers. The second one is fibrillar cobalt trimolybdate octahydrate CoMo₃O₁₀·8H₂O. Both compounds exhibit paramagnetic behaviour at room temperature. However, in the first one copper ions form: dimers linked by oxygen bridges, in which exchange interactions between two localized spin states occur. The second compound consists of isolated cobalt ions in the octahedral surroundings, resulting in magnetic properties deviating from the Curie law.

DOI: 10.12693/APhysPolA.126.250
PACS numbers: 75.50.Xx, 75.50.Ee, 75.50.-y