| 摘要 |
PURPOSE:To provide sharp resonance characteristics to frequencies and to attain the tuning, by using a garnet single crystal thin film whose saturated magnetization depends on regions for a surface magnetrostatic wave element. CONSTITUTION:The regions with different magnetic characteristics are provided in the direction of propagation of magnetostatic waves periodically. The period of the structure of periodicity is not necessarily constant and this structure of the periodicity is formed with the molecular beam epitaxial growth, the liquid phase growth, or the ion implantation. That is, a YIG single crystal film 21 having 10mum width, 70mum is period, 15mum thickness, and 4piMSA=1780 Gauss in saturated magnetization, is grown in stripes on a nonmagnetic GGG substrate 1 with the selective molecular beam epitaxial grown method using a mask. Further, Ga:YIG single crystal film 22 having 60mum width, 70mum in period A, 15mum thickness and 4piMSB=600 Gauss in saturated magnetization, are grown on recesses where said YIG single crystal film 21 is not grown, thus obtaining the structure where the periodical change is attained toward the (y) of the saturated magnetization. |
