Phase diagram of the itinerant-electron ferromagnet ZrZn₂

The weak itinerant-electron ferromagnet ZrZn₂ exhibits intriguing high-pressure properties, such as non-Fermi-liquid behavior and the electronic topological transition (the Lifshitz transition). We report the detailed magnetic properties at high pressures and propose a novel phase diagram containing a crossover temperature that emerges from a metamagnetic critical point.