Journal of Low Temperature Physics

, Volume 179, Issue 1–2, pp 62–68 | Cite as

On the Antiferromagnetic Superconductor YbPd\(_2\)Sn: The Case for Local-Moment Quantum Criticality

  • D. Britz
  • A. M. Strydom


The extraordinary Heusler compound YbPd\(_2\)Sn is a near-full magnetic moment Yb\(^{+3}\) paramagnet at high temperature, becomes superconducting below \(T_\mathrm{sc}\simeq {2~}\)K, and orders long-range antiferromagnetic at \(T_\mathrm{N}~=~0.2~\)K. \(T_\mathrm{sc}\) is of re-entrant nature for fields between \(0.04\) and \(0.05~\)T. The \(T\rightarrow 0\) superconductivity is quenched in a field of \(0.04~\)T, whereas the field suppression of \(T_\mathrm{N}\) requires upward of \(0.3~\)T. This presents the possibility to study the stability of magnetic order and its \(T_\mathrm{N}\rightarrow 0\) behavior in the normal region of phase space. In this work, we are concerned with critical effects accompanying the suppression of magnetic order in YbPd\(_2\)Sn as a local-moment antiferromagnet, and we formulate a description of the specific heat of YbPd\(_2\)Sn in terms of field-driven quantum criticality.


Antiferromagnetic order Superconductivity Quantum criticality 



AMS thanks the Research Committee of UJ and the NRF-SA (2072956) for financial assistance. DB thanks the Research Committee of UJ for a Doctoral Fellowship.


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© Springer Science+Business Media New York 2014

Authors and Affiliations

  1. 1.Highly Correlated Matter Research Group, Physics DepartmentUniversity of JohannesburgAuckland ParkSouth Africa

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