Critical end-point and metamagnetic quantum criticality in Sr3Ru2O7
  We report a metamagnetic critical point at (B*,T*)=(5.1T,1.1K) for magnetic fields applied perpendicular to the (tetragonal) c-axis of Sr3Ru2O7. First-order behaviour well below T* indicates that (B*,T*) marks a critical end-point that terminates a line of first-order metamagnetic transitions. The absence of first-order behaviour in the metamagnetic transition with B||c confirms that the non-Fermi liquid behaviour for B||c is underpinned by a metamagnetic quantum critical end-point for which T*->0. Scaling behaviour of the resistivity under hydrostatic pressure yields the surprising result that although B* increases rapidly with pressure, T* has only a weak pressure dependence. 
May Chiao, C. Pfleiderer, R. Daou, A. McCollam, S.R. Julian, G.G.   Lonzarich, R.S. Perry, A.P. Mackenzie, Y. Maeno