A magnetic recording medium containing a niobium-containing seedlayer having a thickness from about 1 \u212b to about 40 \u212b, and a method of making the same. Air ventilation through the cover and about the interior foam is permitted by a vent that restricts insect, article and fluid passage through the vent. A voltage pulse waveform having a low or very low duty-cycle is applied to the cutting electrode to cut the tissue or other material by producing a vapor cavity around the cutting portion of the electrode and ionizing a gas inside the vapor cavity to produce a plasma.