| 摘要 |
PURPOSE:To protect a weak MR element for an electromagnetic wave, etc., from an external part and to prevent a noise generation by forming a superconducting thin film composed of a superconducting material between a front part yoke and a rear part yoke. CONSTITUTION:A superconducting thin film 8 is formed between a front part yoke 2 and a rear part yoke 3 and on both yokes of an MR head to use a magneto-resistance effect to read the information recorded to a magnetic body. Thus, a magnetic flux does not pass through the space of the front part yoke 2 and the rear part yoke 3 and passes to the front part yoke 2 an MR element 5 the rear part yoke 3. Consequently, the magnetic flux efficiently changes the resistance value of the MR element 5, the superconducting thin film 8 has the action of the magnetic interruption, and therefore, the element can be protected from an electromagnetic wave from the external part impressed to the MR element 5. Consequently, there is no danger that the noise occurs at the MR element 5. |
