| 摘要 |
PROBLEM TO BE SOLVED: To provide a magnetometric sensor comprising a magnetic focusing plate made of a ferromagnetic material and a magnetoelectric device for detecting a magnetic field leaking from the magnetic focusing plate, and having little characteristic dispersion. SOLUTION: This sensor is constituted of the magnetic focusing plate made of the ferromagnetic material and Hall elements 4, 5 which are magnetoelectric devices for detecting the magnetic field leaking from the magnetic focusing plate. The magnetic focusing plate comprises regions A, B, C arranged continuously in the magnetic field direction to be measured and having three different saturation external magnetic field intensities, and is constituted of a first magnetic focusing plate 1 having the region A saturated by an external magnetic field intensity x, a second magnetic focusing plate 2 having the region B saturated by an external magnetic field intensity y, and a third magnetic focusing plate 3 having the region C saturated by an external magnetic field intensity z. The relation among the external magnetic field intensities x, y, z is x, z>y, and a continuous structure is formed, wherein the first magnetic focusing plate 1 is connected to the third magnetic focusing plate 3 through the second magnetic focusing plate 2. COPYRIGHT: (C)2004,JPO&NCIPI
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