# Behaviour of MNPs under pulsed-DC MF

1. Jan 22, 2015

### TESL@

Hello,

I'd like to ask how a superparamagnetic nanoparticle behaves under pulsed magnetic field (i.e. positive square wave) different than under a sinusodial AC MF. I have an idea but I need your information/opinions.

Thank you.

2. Jan 22, 2015

### Staff: Mentor

A pulsed field can be simply considered as a sum of sinusoidal fields at different frequencies. If you know the response at all the sinusoidal frequencies (and assuming no non-linearities) then you know the response to the square wave or any other waveform.