Entropy Evolution in the Magnetic Phases of Partially Frustrated CePdAl

S. Lucas, K. Grube, C. L. Huang, A. Sakai, S. Wunderlich, E. L. Green, J. Wosnitza, V. Fritsch, P. Gegenwart, O. Stockert, H. V. Löhneysen

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31 引文 斯高帕斯(Scopus)

摘要

In the heavy-fermion metal CePdAl, long-range antiferromagnetic order coexists with geometric frustration of one-third of the Ce moments. At low temperatures, the Kondo effect tends to screen the frustrated moments. We use magnetic fields B to suppress the Kondo screening and study the magnetic phase diagram and the evolution of the entropy with B employing thermodynamic probes. We estimate the frustration by introducing a definition of the frustration parameter based on the enhanced entropy, a fundamental feature of frustrated systems. In the field range where the Kondo screening is suppressed, the liberated moments tend to maximize the magnetic entropy and strongly enhance the frustration. Based on our experiments, this field range may be a promising candidate to search for a quantum spin liquid.

原文English
文章編號107204
期刊Physical review letters
118
發行號10
DOIs
出版狀態Published - 2017 三月 7

All Science Journal Classification (ASJC) codes

  • 物理與天文學 (全部)

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