Knowledge Bank

Magnetic circular dichroism (MCD) allows diagonal and nondiagonal matrix elements of the magnetic dipole moment operator to be determined experimentally. MCD measurements at various temperatures down to $4\circ K$ are of great aid in clarifying spectral assignments of broad bands and have no counterpart in spectroscopy. This will be demonstrated in the particular examples of the transitions $\mathrm{<mrow\; data-mjx-texclass="ORD">4</mrow>}I9/2-2P1/2$ of $Nd2+$ in $CaWO4$ and $\mathrm{<mrow\; data-mjx-texclass="ORD">3</mrow>}H4-2Po$ in $AILaO3$.