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. 2017 Feb 15;3(2):e1601469. doi: 10.1126/sciadv.1601469

Fig. 4. Individual particle dynamics.

Fig. 4

(A) Mean square displacement (MSD) of individual particles at frequency f = 40 Hz and magnetic field magnitude H0 = 70 Oe; the dashed line is a linear law. For longer times, the curve saturates due to finite system size. Inset: Angular mean square displacement (〈δϕ2〉) for the same experimental conditions. (B) Particle velocity distribution function; the average is taken over 4 × 104 instantaneous velocity values of individual rollers at f = 40 Hz. (C) Typical particle velocity normalized by maximally attained velocity V0 = ωa, with ω = 2πf. The dashed line indicates the value of the slipping parameter αs used in simulations.