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\subsection{Varying the Current}  We also varied current, keeping all other values constant, and measured precession frequency. We found there to be no dependence, as expected and predicted by Equation~\ref{eq:precession}. We expect the magnetization to vary according to Equation~\ref{eq:tanh} when we artificially increase Earth's magnetic field, using a constant polarization time (which was in this case 10 seconds), as seen in Fig.~\ref{fig:polarizationtime10s}. Our data was initially plotted against voltage, not magnetization, but Eq.~\ref{eq:tanh} allows us to find magnetization as we know or can calculate $\mu$ using   \begin{equation}  \label{eq:mu}  \mu=\gamma\hbar\sqrt{I(I+1)}  \end{equation}