Domain wall motion type magnetic recording element having a domain wall movement detection terminal

摘要

PPROBLEM TO BE SOLVED: To provide a magnetic wall displacement type recording element with magnetic wall displacement detecting terminals which needs a small current density for writing and has simple element structure. PSOLUTION: The element comprises a ferromagnetic thin line 1 formed on a Si substrate, current electrodes 2a and 2b which are in contact with both ends of the thin line 1, respectively, and voltage electrodes 4a and 4b which are joined to the thin line 1 and the current electrodes 2a and 2b so that they can cooperate with the current electrodes 2a and 2b to measure voltage of a part of the ferromagnetic thin line 1. A magnetic wall 3 is induced in the ferromagnetic thin line 1 when the element is produced. A recessions 5 are formed between the voltage electrodes 4a and 4b and between the current electrode 2a and the voltage electrode 4a on the upper side of the ferromagnetic thin line 1 by means of ion beam etching etc. When a read out current 8 is applied, voltage between the voltage electrodes 4a and 4b is measured to detect the existence of the magnetic wall 3 between them to identify recorded data. PCOPYRIGHT: (C)2008,JPO&INPIT