MAGNETIC FIELD SENSOR, PHYSICAL PROPERTY MEASURING DEVICE AND PHYSICAL PROPERTY MEASURING METHOD USING THE SAME, AND MAGNETIC FIELD SENSOR MANUFACTURING METHOD

摘要

A magnetic field sensor includes a film capable of generating a current magnetic effect and detects a magnetic field by using a change of electric property caused in the film when a magnetic field is applied. The film contains 90 atomic % of a total of Ge and Cr or more. The film has a hall resistance showing a high proportionality for a magnetic field in the environment of a cryogenic temperature and a high magnetic field.