Magnetic properties of Cu3.9Fe3.4V6O24 with a lyonsite structure

Typek, J.; Żołnierkiewicz, G.; Bobrowska, Marta; Guskos, N.; Blonska-Tabero, A.

doi:10.1016/j.solidstatesciences.2014.05.010

Cited by 6 publications

(1 citation statement)

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“…oxidative dehydrogenation of the saturated to unsaturated compounds, are intensively studied by different techniques, including electron paramagnetic resonance (EPR) [1][2][3][4][5][6][7][8][9]. From the point of view of desired catalytic properties, the vanadates containing in their structure chains of face-sharing metal octahedra and isolated VO tetrahedral are especially useful.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Study of Phases in FeVO₄-Co₃V₂O₈ System

et al. 2017

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Magnetic properties of four nFeVO4/(1-n)Co3V2O8 samples obtained in reactions between FeVO4 and Co3V2O8 (n = 0.96, 0.86, 0.84 and 0.83, samples designated S1, S3, S4, S5, respectively) have been investigated by DC magnetisation in field cooling and zero-field-cooling modes and EPR. DC magnetic susceptibility showed paramagnetic behavior of all samples in high-temperature range (T > 20 K) and transition to antiferromagnetic state at 16-18 K (depending on sample iron content). Additional magnetic freezing at 8 K was registered for S3-S5 samples containing larger amount of cobalt. The Curie-Weiss law in 100-300 K temperature range indicates that Co 2+ is in the high-spin state (S = 3/2). From the parameters of the hysteresis loop observed for the samples it was calculated that 0.58% of all magnetic (Fe 3+ , Co 2+ ) ions were involved in the ferromagnetic states. EPR spectra of the samples were recorded in high temperature range (T > 90 K). The temperature dependence of the spectral parameters (resonance field, linewidth, integrated intensity) suggested the Fe 3+ high-spin ions coupled by antiferromagnetic interaction and clusters of ions play major role in EPR spectra.

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