▎ 摘　　要

NOVELTY - The sensor has a bridge module covered with a free ferromagnetic layer (5) and arranged with a graphene pier (41) and a public electrode (6) along upper and lower directions. Another bridge module is covered with a fixed ferromagnetic layer (8) and arranged with a bias electrode (7) and another graphene pier (42) along upper to lower direction. An upper part of a graphene pier assembly (3) is covered with an insulation layer (2). An upper part of a control electrode (1) is covered with the insulation layer. The free ferromagnetic layer is made of iron, cobalt, or nickel material. USE - Bridge-type graphite alkenyl magnetic sensor. ADVANTAGE - The sensor is simple in structure, small in size, inexpensive and convenient to manufacture. The sensor has high resolution ratio. DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of a bridge-type graphite alkenyl magnetic sensor. Control electrode (1) Insulation layer (2) Graphene pier assembly (3) Free ferromagnetic layer (5) Public electrode (6) Bias electrode (7) Fixed ferromagnetic layer (8) Graphene piers (41, 42)