| The recently discovered multicomponent vanadate Cd4Fe8V10O41, isostructural with the previously studied Mg3Fe4(VO4)6, was synthesized and investigated by the electron paramagnetic resonance (EPR) technique. According to the nominal stoichiometry of the Cd4Fe8V10O41 compound the ions (excluding iron ions) are nonmagnetic. The registered EPR spectra in the 4-300K temperature range were dominated by the presence of a very broad almost symmetrical resonance line which disappeared below 20K. At room temperature this resonance line was centred at Hr=3358 Gs with linewidth ΔHpp= 835 Gs. Its amplitude decreased with the decreasing temperature and below 60K the linewidth strongly depended on the temperature. Below 60K the line shifted significantly with the decreasing temperature towards lower magnetic fields. In the same temperature range the EPR spectra were deconvoluted on two component Lorentzian lines, attributed to two different types of spin clusters. As the ground state of both antiferromagnetic spin clusters was nonmagnetic, the lines were not observed below 20K. The cluster visible in a wide temperature range up to room temperature was attributed to Fe3+ spins, while the other cluster observed only at low temperature involved also Cd2+ ions. |
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