具有单轴及立方各向异性的La,Ga:YIG单晶薄膜的静磁模

Magnetostatic Mode Spectra of Single Crystal La,Ga:YIG Films with Uniaxial and Cubic Anisotropies

本文研究了具有单轴及立方各向异性介质中的静磁波,发现了体模式与表面模式的临界角变化及K_x=0时体模式的分裂.结果由La,Ga;YIG单晶薄膜的铁磁共振波谱得到实验验证.

The effect of magnetocrystalline anisotropy on the magnetostatic mode spectra in a tangentially magnetized (1 1 1) YIG film is investigated theoretically. Both the cubic and uniaxial anisotropies have been taken into consideration. The anisotropy modifies the cutoff of the surface branch and the critical angle between the bulk and surface modes, and results in bulk excitation within a series of Damon-Eshbach surface modes. The magnetostatic mode spectra of La,Ga:YIG film are measured. Experimental results are in agreement with calculated ones.