Increasing the magnetic sensitivity of liquid crystals by rod-like   magnetic nanoparticles
  Magnetic Fr\'eedericksz transition was studied in ferronematics based on the nematic liquid crystal 4-(trans-4'-n-hexylcyclohexyl)-isothiocyanatobenzene (6CHBT). 6CHBT was doped with rod-like magnetic particles of different size and volume concentration. The volume concentrations of magnetic particles in the prepared ferronematics were $\phi_1$ = 10$^{-4}$ and $\phi_2$ = 10$^{-3}$. The structural changes were observed by capacitance measurements that demonstrate a significant influence of the concentration, the shape anisotropy, and/or the size of the magnetic particles on the magnetic response of these ferronematics. 
P. Kop\v{c}ansk\'y, N. Toma\v{s}ovi\v{c}ov\'a, T. T\'oth-Katona, N.   \'Eber, M. Timko, V. Z\'avi\v{s}ov\'a, J. Majoro\v{s}o...
cond-mat.soft