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Frustrated magnets can exhibit interesting behaviors, such as exotic order, liquid-like behavior, glassy behavior, and so on, varying from one material to another. In this talk, we introduce our work on a frustrated quasi-one-dimensional Ising magnet, Ca3Co2O6. This material has long been known to exhibit a peculiar combination of extremely slow spin dynamics and intriguing magnetic orders, such as evenly-spaced metastable magnetization steps and the long-wavelength spin density wave order. Recently, an elaborate field-cooling protocol was proposed to overcome an extraordinarily long timescale of spin relaxation that impeded previous experimental studies in equilibrium. Motivated by this progress, we combine Monte Carlo simulations and Ginzburg-Landau theory to study the magnetic field-induced deformation of the spin density wave order in Ca3Co2O6. We also discuss relations with previously reported experimental phase diagrams, which can be considered as out-of-equilibrium.
Yoshitomo Kamiya is a tenure-track associate professor in Shanghai Jiao Tong University since 2018, working in the field of condensed matter theory. Graduating from the University of Tokyo in 2011, he was in Los Alamoas National Laboratory (USA, 2011-2014) and RIKEN (Japan, 2014-2018) for postdoctoral positions. His research interests are in various equilibrium/non-equilibrium phenomena in strongly-correlated systems, especially quantum magnets.