The magneto-optical readout system based on a signal transfer from videotape to magnetic garnet film has been proposed. To find the garnet film suitable for this system, we developed an analytical pattern of transfer readout. The garnet film considered has a magnetization almost in-plane but slightly inclined with respect to the film plane. On the basis of this model, when a videotape on which the bit length of 0.4 μm was recorded and brought close to the garnet film, the tilt angle of magnetization was estimated to be about 5 degrees for the garnet film with thickness of 0.6 μm, magnetization of 3 × 10-2 Wb/m2, and saturation field of 39 kA/m. The transfer of bit patterns from videotape to garnet film was demonstrated by using a polarizing microscope. The dependence of signal level on bit length obtained by the readout experiment with laser beam in which videotape was moved agreed well with that predicted by calculation.
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机译:已经提出了一种基于从录像带到石榴石磁性薄膜的信号传输的磁光读出系统。为了找到适用于该系统的石榴石薄膜,我们开发了转移读数的分析模式。所考虑的石榴石薄膜几乎在平面内具有磁化强度,但相对于薄膜平面略微倾斜。在此模型的基础上,当录制的录像带上记录有0.4μm的位长并接近石榴石薄膜时,对于厚度为0.6μm的石榴石薄膜,磁化的倾斜角估计约为5度,磁化强度为3×10 -2 sup> Wb / m 2 sup>,饱和场为39 kA / m。使用偏光显微镜演示了从录像带到石榴石胶片的位图样转移。通过将录像带移动的激光束进行的读出实验所获得的信号电平对位长的依赖性与通过计算所预测的一致。
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