| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1331936 | Journal of Solid State Chemistry | 2006 | 6 Pages |
We have investigated the magnetic and transport properties of Dy5CuPb3Dy5CuPb3 by magnetic susceptibility, electrical resistivity, magnetoresistance and thermoelectric power measurements. The compound crystallises in the hexagonal Hf5CuSn3Hf5CuSn3-type structure (space group P63/mcmP63/mcm) and probably undergoes two successive magnetic transitions at TC=45.0±0.5K and TN=6.5±0.5K. The experimental data are indicative of a ferri- and antiferromagnetic types of the transitions, respectively. We attribute the double magnetic phase transition and the reduction of the magnetisation values at low temperatures to associate with the two non-equivalent magnetic sublattices of the Dy3+Dy3+ ions. We observed a large magnetoresistance value of -24%-24% at temperatures in between TNTN and TCTC. The investigated compound has a negative thermoelectric power of -17μV/K at 300 K. We interpret the overall behaviour of the S(T)S(T)-curve to two different mechanisms: magnetic and charge carrier diffusion.
Temperature dependence of the reciprocal magnetic susceptibility. The dashed line is the fit of the experimental data to the Curie–Weiss law. Inset a shows the low-temperature magnetisation. Inset b shows the product χTχT as a function of temperature.Figure optionsDownload full-size imageDownload as PowerPoint slide
