Figure 10.

Relaxation time $\tau$ versus the applied magnetic field H. Curves 1 and 2—theoretical calculations [92] for a ferrofluid with the same parameters as in Figure 9. Theory: the shear rate $\dot{\gamma }$ changed in a stepwise manner from 16 s⁻¹ to 1.6 s⁻¹ (line 1) and back (line 2). Dots 3—experiments [70] with an oscillating shear flow. Published with the permission of the American Physical Society (license RNP/20/AUG/029408).