Values of the viscoelastic moduli corresponding to the LVR for a frequency of 1 Hz, as a function of the magnetic field strength for suspensions of magnetic particles in solutions of alginate polymer: unfilled diamond/filled diamond, sample 5Fe-10LVSA; unfilled circle/filled circle, sample 5Fe-15VSA; unfilled triangle/filled triangle, sample 5Fe-20LVSA; unfilled square/filled square, sample 5Fe-8MVSA. Open symbols represent values of the storage modulus (G′) and full symbols represent values of the loss modulus (G′′). (Online version in colour.)