Suppression of Shastry-Sutherland phase driven by electronic concentration reduction in magnetically frustrated Ce$_2$Pd$_2$Sn$_{1-y}$In$_y$ alloys

J. G. Sereni; J. Roberts; F. Gastaldo; M. Giovannini

doi:10.1103/PhysRevB.100.054421

paper

Suppression of Shastry-Sutherland phase driven by electronic concentration reduction in magnetically frustrated Ce $_{2}$ Pd $_{2}$ Sn $_{1 - y}$ In $_{y}$ alloys

arXiv:1902.04540 · doi:10.1103/PhysRevB.100.054421

Abstract

Shastry-Sutherland lattice was observed as alternative ground state in Rare Earth intermetallic with Mo $_{2}$ B $_{2}$ Fe and U $_{2}$ Pt $_{2}$ Sn anisotropic structures where magnetic frustration is favored. In the case of Ce $_{2}$ Pd $_{2}$ Sn, it was shown that such phase can be suppressed by the application of magnetic field and, in this work, its stability is studied as a function of the electronic concentration by doping the Sn(4+) lattice with In(3+) atoms. Magnetic and specific heat measurements show that around 50\% substitution the Shastry Sutherland lattice vanishes in a critical point. This result confirms the strong dependence of that phase on the electron density because a recent investigation on the Pd rich solid solution Ce $_{2 + ε}$ Pd $_{2 - ε}$ In $_{1 - x}$ Sn $_{x}$ (with $ε < 0$ ) demonstrates that atomic disorder dominates the phase diagram at intermediate Sn/In concentration inhibiting magnetic frustration effects. In the alloys investigated in this work, the $ε > 0$ character stabilizes the ferromagnetic ground state all along the concentration, allowing the Shastry Sutherland lattice formation on the Sn rich side.

5 pages, 6 figures

Suppression of Shastry-Sutherland phase driven by electronic concentration reduction in magnetically frustrated Ce2​Pd2​Sn1−y​Iny​ alloys

Abstract

References in corpus (4)

Suppression of Shastry-Sutherland phase driven by electronic concentration reduction in magnetically frustrated Ce $_{2}$ Pd $_{2}$ Sn $_{1 - y}$ In $_{y}$ alloys