Weak transverse magnetic field effect on the viscosity of Mn(NO3)2H2O solution at several temperature

Experiments show that transversally applied magnetic field H of strength 12 kG at 10, 15, 20, 25, 30, 40 and 60°C and the ambient pressure decreases the viscosity of high concentration Mn(NO₃)₂H₂O solution. The largest value of this decrease occurs at the temperature range of 20–25°C. On the other hand, at low paramagnetic ion concentrations, the applied magnetic field increases the viscosity of Mn(NO₃)₂H₂O solution in such a way that the observed effect value in the limit seems to approach the already measured viscosity increase of the pure water. However, the temperature dependence of the observed viscosity increase of the given dilute paramagnetic Mn(NO₃)₂H₂O solution appears to be more complex and at some temperature even opposite to that already shown viscosity—temperature behavior of the diamagnetic pure water.