Figure 4
From: Field Angle Tuned Metamagnetism and Lifschitz Transitions in UPt3
The left part of the figure shows sound velocity with q || a measured for different angles of the applied magnetic field ranging from the a-axis (0°) to the c-axis (90°) at T = 0.5 K. For the a-axis the sound velocity shows a large decrease corresponding to the metamagnetic transition at 20 T. For increasing angle the curves shift to the right as the metamagnetic transition goes to higher field as 1/cosθ. For angles larger than 45° instead of a continued steep downward trend in the velocity we see an upturn at larger fields. For angles close to the c-axis features at ≈9 T and 30 T become apparent in the form of a dip similar to that shown in Fig. 2a. The right panel shows the data with a B2 background subtracted similar to Fig. S1.
