Treatment manner of the magnetic garnet monocrystal film for the magnetostatic wave component and production device null of the magnetic garnet monocrystal film which has its treatment

摘要

PURPOSE: To eliminate aging in the initial characteristics by previously magnetizing a magnetic garnet single crystal film through application of a DC magnetic field and arranging the magnetization vector in a specified direction. ;CONSTITUTION: A magnetic garnet single crystal film is previously magnetized by applying a DC magnetic field thereto before it is employed as a magnetostatic wave element. The magnetic garnet single crystal film is represented by a formula R1_3-xR2_xFe_5-yM_yO₁₂ (where, R1 is one of Y or Tb, R2 is at least one kind of Bi, B, Sb and lanthanum based transition element, M is at least one kind of Ga, Al, In, Tl, Co and Ni or at least one kind of Zr and Si and Mg, and 0≤x≤3, O≤y≤5). The production system is a liquid phase epitaxial growth system having vertical furnace tube structure wherein an electromagnet 21 is disposed, as a magnetic processing means, around the cooling part for the magnetic garnet single crystal film 18 of a vertical furnace tube 11.;COPYRIGHT: (C)1996,JPO