PIEZOELECTRIC AND MAGNETOSTRICTIVE COMBINED TYPE MAGNETIC FIELD SENSOR AND MAGNETIC ELECTRIC POWER GENERATION DEVICE

摘要

To provide a piezoelectric and magnetostrictive combined type magnetic field sensor etc., capable of applying a bias magnetic field to a magnetostrictive layer with simpler constitution than before.SOLUTION: A piezoelectric and magnetostrictive combined type magnetic field sensor 1A according to the present invention comprises: a piezoelectric layer 5 formed of a multiferroic material; an upper magnetostrictive layer 7 provided on the piezoelectric layer 5; and a voltage detection part 11 detecting a voltage developed in the upper magnetostrictive layer 7 by piezoelectric effect. A static magnetic field or exchange coupling magnetic field 5B2 generated by the piezoelectric layer 5 is applied as a bias magnetic field to the upper magnetostrictive layer 7.SELECTED DRAWING: Figure 1