Tricritical wings in itinerant ferromagnet LaCrGe3 under pressure

In ferromagnetic systems, quantum criticality is avoided either by a change of the transition order, becoming of the first order at a tricritical point (TCP), or by the appearance of modulated magnetic phases. In the first case, for pressures above TCP, application of magnetic field reveals the wing structure phase diagram in $T$-$p$-$H$ space. In the case where the transition leads to modulated magnetic phase, no wing structure phase diagram has been reported so far. Recent pressure study on ferromagnetic LaCrGe$_3$ revealed that the paramagnetic-ferromagnetic quantum critical point is avoided by the appearance of a modulated magnetic phase\footnote{Taufour {\it et al.} Phys. Rev. Lett. \textbf{117}, 037207 (2016)}. We will present the constructed $T$-$p$-$H$ phase diagram of LaCrGe$_3$ via electrical resistivity measurement and discuss a new possibility where tricritical wings appear in addition to the modulated magnetic phase.