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Magnetic phase transitions in R5NiPb3 (R=Ce, Nd, and Gd)

J. Appl. Phys. 105, 07E118 (2009); doi:10.1063/1.3075562

Published 4 March 2009

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V. Goruganti, K. D. D. Rathnayaka, and Joseph H. Ross, Jr.
Department of Physics, Texas A&M University, College Station, Texas 77843, USA
We report magnetic and thermodynamic measurements for R5NiPb3 (R=Ce,  Nd,  Gd). Gd5NiPb3 has a transition at 68  K, apparently ferrimagnetic from specific heat and magnetization measurements. For Ce5NiPb3, a phase transition is observed in heat capacity at 48 K, with the field dependence of heat capacity and magnetization also indicating ferrimagnetic behavior. Ce5NiPb3 shows metamagnetism at low temperatures, behavior rather similar to Nd5NiPb3 with its previously reported magnetic ordering below 42 K. Using nonmagnetic La5NiPb3, we isolated the magnetic heat capacity for all three materials. The results include a relatively large linear-T term in the specific heat and integrated magnetic entropies consistently smaller than expected. ©2009 American Institute of Physics
History: Presented 14 November 2008; received 22 September 2008; accepted 14 December 2008; published 4 March 2009
Permalink: http://link.aip.org/link/?JAPIAU/105/07E118/1
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0021-8979 (print)   1089-7550 (online)
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REFERENCES (11)
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