Colloidal dimers show static orientational bistability and a field-strength bifurcation to full rotations due to combined induced and body-fixed magnetic moments.
Rigid magnetic-magnetic dimers are found at low concentration in all samples and arise from irreversible surface interactions of two beads, giving a centre-centre separationℓ≈σ
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Orientational bistability and field-controlled switching of a superparamagnetic dimer
Colloidal dimers show static orientational bistability and a field-strength bifurcation to full rotations due to combined induced and body-fixed magnetic moments.