Evolution of magnetic phases in beta-Li2IrO3 under high magnetic fields*

The Kitaev model describes a honeycomb net of Ising spins where each bond direction exchange-couples an orthogonal component of spin. Remarkably, this model is exactly solvable and predicts a quantum spin liquid ground state. Within the past decade, several materials have been theorized to realize the Kitaev model in their magnetic interactions. One of these materials is beta-Li2IrO3, which crystallizes in a 3D "hyperhoneycomb" structure. While this material does not possess a quantum spin liquid ground state, it contains a variety of interesting magnetic phases that coexist at intermediate temperature. In this talk, we describe how these phases evolve under strong magnetic fields using the state-of-the art technique of resonant torsion magnetometry.