im doing a simulation on a magnetic moment in a magnetic field B and im quite stuck.(adsbygoogle = window.adsbygoogle || []).push({});

its a set of coupled equations: m'-x=B*m-y & m'-y= - B*m-x

where m-x is the x component, ' is rate of with respect to time etc.

the vector should be precessing in a circle with frequency w= - B, B is set to one so it should make one rotation in one second -> full cycle -> full sine wave, but i seem to only be getting about half a sine wave

the cosine term in the m'-y formula can be neglected, as can the m'-z and m-z columns because the starting point is M'= M X B (the cross product of the moment and the magnetic field) and B is defined as being in the z direction.

im pretty sure the equations are right and the problem lies in my formulae in excel, any help will be greatly appreciated:!!)

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# Excel - help with eulers method on coupled equations

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