We performed time-resolved pump–probe measurements using rare-earth iron garnet Gd_3/2Yb_1/2BiFe₅O₁₂ as a two-sublattice ferrimagnet. We measured the initial phases of the magnetic resonance modes below and above the magnetization compensation temperature to clarify the sublattice selectivity of the inverse Faraday effect in ferrimagnets. A comparison of the time evolution of magnetization estimated using the equations of motion revealed that the inverse Faraday effect occurring in ferrimagnetic materials has sublattice selectivity. This is in striking contrast to antiferromagnets, in which the inverse Faraday effect acts on each sublattice identically. The initial phase analysis can be applied to other ferrimagnets with compensation temperatures.

中文翻译：

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亚晶格稀土铁石榴石中的亚晶格选择性逆法拉第效应

我们使用稀土铁石榴石 Gd _3/2 Yb _1/2 BiFe ₅ O ₁₂作为双亚晶格亚铁磁体进行时间分辨泵浦探针测量。我们测量了低于和高于磁化补偿温度的磁共振模式的初始相位，以阐明亚铁磁体中逆法拉第效应的亚晶格选择性。使用运动方程估计的磁化强度随时间演化的比较表明，亚铁磁材料中发生的逆法拉第效应具有亚晶格选择性。这与反铁磁体形成鲜明对比，在反铁磁体中，反法拉第效应对每个亚晶格的作用相同。初始相分析可应用于具有补偿温度的其他亚铁磁体。