| 摘要 |
PURPOSE:To obtain a pickup to pick up a high-frequency component effectively and to improve the high-frequency property by forming a magnetic core by laminating magnetic core composing materials which consists of a ferromagnetic material in plural layers to the diameter direction of the magnetic core. CONSTITUTION:A magnetic core 2A presents a cylindrical form in this pickup 20. This magnetic core 2A is composed by laminating plate bodies (magnetic core composing materials) 12, 12,... which consist of a ferromagnetic material, in the thickness direction, and the laminating direction is made to face the diameter direction of the magnetic core 2A. Each plate body 12 consists of an Fe-Cr-Co system magnet. The plate bodies 12, 12,... have about 0.3mm of thickness to the diameter phi 6mm of the magnetic core 2A, for example. Between the above plate bodies 12, 12,..., electric insulating layers 13, 13,... are formed. The electric insulating layer 13 is composed of a phenol resin, for example, or an adhesive with an electric insulating property and the like. |
