Suppression of the Shastry-Sutherland phase in Ce${}_2$Pd${}_2$Sn at a field induced critical point

Abstract

The magnetic phase diagram of Ce${}_2$Pd${}_2$Sn is investigated through the field dependence of thermal, transport and magnetic measurements performed at low temperature. The upper transition, $T_M=4.8$ K is practically not affected by magnetic field up to B=1 T, whereas the lower one $T_C(B)$ rapidly increases from 2.1 K joining $T_M$ in a critical point at $T_{cr}=(4.2\pm 0.3$)K for $B_{cr}=(0.12\pm 0.03)$ T. At that point the intermediate phase, previously described as an unstable Shastry-Sutherland phase, is suppressed. A detailed analysis around the critical point reveals a structure in the maximum of the $\partial M/\partial B(B)$ derivative which could be related to the formation of a novel phase in that critical region.

5 pages, 6 figures

References in corpus (3)

• Fermi-liquid instabilities at magnetic quantum phase transitions
• Yb${}_2$Pt${}_2$Pb: Magnetic frustration in the Shastry-Sutherland lattice
• Unstable Shastry-Sutherland phase in Ce${}_2$Pd${}_2$Sn

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• Superconductivity in La${}_2$Ni${}_2$In
• Strongly Anisotropic Magnetic Phase Diagram of CeAu2Ge2
• Suppression of Shastry-Sutherland phase driven by electronic concentration reduction in magnetically frustrated Ce${}_2$Pd${}_2$Sn${}_{1-y}$In${}_y$ alloys
• Tri-critical point and suppression of the Shastry-Sutherland phase in Ce${}_2$Pd${}_2$Sn by Ni doping