Magnetic, magnetocaloric, electrical properties of nanocrystalline and coarse-grained gadolinium (Gd) metals were compared in the present work. The bulk nanocrystalline matels have been consolidated from Gd nanoparticles using spark plasma sintering technique. With the decrease of Gd grain size from micrometer to nanometer range, Curie temperature of the nanocrystalline Gd shifts by more than 6 K below that of coarse-grained and the magnetic moment per Gd atom at 5 K dropped noticeably from 7.81uB to 6.31uB. Magnetic entropy change of crystalline Gd drops surprising from 10.07 to 4.47 Jkg-1·K-1 at ΔH=5 T; adiabatic temperature change drops from 3.5 K to 1.1 K with ΔH=1.5 T. However, magnetocaloric effect of the nanocrystalline metals exhibit a more constant tendency. The room temperature electrical resistivity increases from 209.68 to 333.04 uΩ cm, while the low temperature electrical resistivity is found to increase surprisingly from 16.51 to 126.30 uΩ cm.
CITATION STYLE
Zeng, H., Wu, Y., Zhang, J., Kuang, C., Yue, M., Chen, Y., & Zhou, S. (2013). Magnetic, Magnetocaloric and electrical properties in bulk nanocrystalline Gd metals. In 8th Pacific Rim International Congress on Advanced Materials and Processing 2013, PRICM 8 (Vol. 2, pp. 1729–1736). John Wiley and Sons Inc. https://doi.org/10.1007/978-3-319-48764-9_217
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