Characterization of two commercially available Hall effect sensors for high magnetic fields and low temperatures

Publisher Website
Google Scholar
Abstract
A series of measurements were performed on two groups of transverse‐configuration Hall effect sensors, each group consisting of devices available from a particular commercial supplier. The Hall voltage output of the probes was measured as a function of magnetic field to 18 T at temperatures of 300, 77, and 1.5–4.2 K; at the same time, the probes were subjected to a program of abrupt thermal cycling and magnetic field cycling. With the aid of computer analysis of the data the following conclusions could be drawn: (1) the outputs of one group of probes were linear with magnetic field within a worst‐case value of ∼±1% up to 8 T, and for the second group, to within ±0.5% up to 8 T and ±1.4% up to 18 T; (2) statement (1) was true for any of the selected temperatures; in general, variations of sensor output with temperature proved to be an unimportant factor; (3) the degree of measurement repeatability between thermal cycles varied somewhat from probe to probe within a group, but was significantly different between the two groups; (4) for a limited number of thermal cycles (∼25), it is clear that a simple calibration procedure would suffice to maintain a field measurement accuracy of ±0.2% up to 14 T, at least for one group of probes.
Keywords