Torque and magnetization measurements in magnetic fields H up to 14 T were
performed on CeCoIn5​ single crystals. The amplitude of the paramagnetic
torque shows an H2.3 dependence in the mixed state and an H2
dependence in the normal state. In addition, the mixed-state magnetizations for
both H∥c and H∥ab axes show anomalous behavior after the
subtraction of the corresponding paramagnetic contributions as linear
extrapolations of the normal-state magnetization. These experimental results
point towards a nonlinear paramagnetic magnetization in the mixed state of
CeCoIn5​, which is a result of the fact that both orbital and Pauli limiting
effects dominate in the mixed state.Comment: 2 pages, 2 figures, conferenc