强磁场中两层膜的铁磁共振场研究

在已有的物理模型基础上,对运动方程作线性化处理,求出了共振场随共振频率以及外场相对膜的倾角的变化关系.对(YEuTmCa)3(FeGe)3O12/(YGdLa)3(FeCa)5O12两层膜作计算,其理论计算与实验相符.结果表明:在强磁场中,铁磁共振谱分为两支,这两支均与外场倾角有关,而且两支之间有间隙,外场为50000A/m附近时形成的间隙最小.

Research on the Ferromagnetic Resonance Field of Double-Layer Film in Strong Magnetic Field

The motion equation, which is fulfilled by magnetizing intensity of the double-layer film in outer magnetic field, is found in this paper. Under the condition of linear similar, the variation relation of resonance field along with the resonance frequency and the dip of outer field to the film is gained. The double-layer film, (YEuTmCa)_3 (FeGe)_3O_ 12 /(YGdLa)_3 (FeCa)_5O_ 12 is calculated, the result of theory computing is as the same as that of the experiment. The result indicates: In the strong magnetic field, ferromagnetic resonance spectrum divides into two branches, which are in relation to the dip of outer field. And there is a space between the two branches, the space producting near 50000 A/m in outer field is the smallest.