A putter head includes a first half member, a second half member, and an insert. The method is of particular importance for measuring metallic contamination on the surface of Ge substrates. 5% TMAH solution at about 70\xb0 C. The controller has a computer-readable medium containing instructions to perform a conditioning method, such as the above-mentioned method. AlCeZr oxide composites produced in this way have an increased thermal stability. A frame supports the stator and a conductivity member flows at least a portion of magnetic flux flowing away from the stator back to the stator.