Low Voltage, High Frequency, High Amperage Power Supply Design
So you are curious about the transient response of some metals, using 1/2 sin to 5 sin period stimuli.

How about synthesizing the waveforms using a switch_mode amplifier.

There will be distortion products. If your output frequency is a sub-multiple of your switching/chopping frequency, the distortion will appear as a waveform error. Thus I'd suggest your switching frequency be variable-swept, over a small range, and you use data-acquisition-averaging to exclude the distortion.

If minor waveform errors are not important, then don't worry about this.