The influence of Er substitution on magnetic and magnetocaloric properties of Dy1−xErxCo2 solid solutions
作者： J. Ćwik , T. Palewski , K. Nenkov , O. Gutfleisch , J. Klamut
DOI: 10.1016/J.INTERMET.2011.07.012
关键词:
摘要: Abstract Magnetic and heat capacity measurements have been carried out on polycrystalline Dy1−xErxCo2 solid solutions (0 ≤ x ≤ 0.3). Powder X-ray diffraction at room temperature revealed that all consist of the C15 cubic Laves phase MgCu2 type structure. These are ferromagnetic with a Curie TC below 138 K. Their temperatures decrease from 138 K for DyCo2 to 106 K Dy0.7Er0.3Co2. At higher temperatures, Curie–Weiss paramagnets. Both magnetic showed samples undergo first-order transition paramagnetic state. Heat allowed us determine Debye temperature. The magnetocaloric effect has estimated both in terms isothermal entropy change adiabatic fields up maximum 3 T.
elsevier.com
sci-hub.se 参考文章(21)
K. A. Gschneidner, H. Takeya, J. O. Moorman, V. K. Pecharsky, S. K. Malik, C. B. Zimm, New Magnetic Refrigeration Materials for the Liquefaction of Hydrogen Advances in cryogenic engineering. ,vol. 39, pp. 1457- 1465 ,(1994) , 10.1007/978-1-4615-2522-6_179
Nguyen Huu Duc, Tsuneaki Goto, Chapter 171 Itinerant electron metamagnetism of co sublattice in the lanthanide-cobalt intermetallics Handbook on the Physics and Chemistry of Rare Earths. ,vol. 26, pp. 177- 264 ,(1999) , 10.1016/S0168-1273(99)26006-0
Niraj K. Singh, K.G. Suresh, A.K. Nigam, S.K. Malik, A.A. Coelho, S. Gama, Itinerant electron metamagnetism and magnetocaloric effect in RCo2-based Laves phase compounds Journal of Magnetism and Magnetic Materials. ,vol. 317, pp. 68- 79 ,(2007) , 10.1016/J.JMMM.2007.04.009
Mohamed Balli, Daniel Fruchart, Damien Gignoux, Ryszard Zach, The “colossal” magnetocaloric effect in Mn1−xFexAs: What are we really measuring? Applied Physics Letters. ,vol. 95, pp. 072509- ,(2009) , 10.1063/1.3194144
P. J. von Ranke, Daniel F. Grangeia, A. Caldas, N. A. de Oliveira, Investigations on magnetic refrigeration: Application to RNi2 (R=Nd, Gd, Tb, Dy, Ho, and Er) Journal of Applied Physics. ,vol. 93, pp. 4055- 4059 ,(2003) , 10.1063/1.1558962
V. K. Pecharsky, K. A. Gschneidner, Magnetocaloric effect from indirect measurements: Magnetization and heat capacity Journal of Applied Physics. ,vol. 86, pp. 565- 575 ,(1999) , 10.1063/1.370767
N.A. de Oliveira, P.J. von Ranke, Magnetocaloric effect in the Laves phase pseudobinary (Er1−cDyc)Co2 Journal of Magnetism and Magnetic Materials. ,vol. 264, pp. 55- 61 ,(2003) , 10.1016/S0304-8853(03)00137-9
Niraj K. Singh, S. K. Tripathy, D. Banerjee, C. V. Tomy, K. G. Suresh, A. K. Nigam, Effect of Si substitution on the magnetic and magnetocaloric properties of ErCo2 Journal of Applied Physics. ,vol. 95, pp. 6678- 6680 ,(2004) , 10.1063/1.1676112
J. Voiron, D. Bloch, Variation avec la pression des points de transition magnétiques des composés TCo2 entre le cobalt et les terres rares Journal De Physique. ,vol. 32, pp. 949- 952 ,(1971) , 10.1051/JPHYS:019710032011-12094900
J. Ćwik, T. Palewski, K. Nenkov, J. Lyubina, O. Gutfleisch, J. Klamut, Magnetic properties and magnetocaloric effect in Dy1−xScxNi2 solid solutions Journal of Alloys and Compounds. ,vol. 506, pp. 626- 630 ,(2010) , 10.1016/J.JALLCOM.2010.06.192