Microwave Hall measurement techniques on low mobility semiconductors and insulators. II. Experimental procedures

An experimental technique for the measurement of Hall mobilities at microwave frequencies is described. The design of a dual mode TE111 cavity is described, and a comparison among receivers for the detection system is given. A procedure for tuning the cavity for orthogonality, degeneracy, and equal quality factors is presented. With a superheterodyne receiver and a well designed gold plated, probe-coupled cavity, the minimum detectable mobility is 0.07 cm2/V⋅sec for a high conductivity sample.