Antiferromagnets generally have a quite high magnetic resonance, as known as the antiferromagnetic resonance, whose frequency goes up to THz range. They are one of the few materials which can magnetically couple to THz electromagnetic waves and are therefore important materials for THz technologies. In this work, we demonstrate that the THz resonance properties, such as resonant frequency and the $Q$-factor, of antiferromagnetic NiO can be controlled over a wide range by substituting the Ni${}^{2+}$ cation with various different cations. Our discussion extends to the trends of how different substitute cations Mn${}^{2+}$, Li${}^{+}$, and Mg${}^{2+}$ impact the resonant properties, which suggests a guideline for designing antiferromagnetic THz materials.

中文翻译：

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通过阳离子取代调节NiO的THz反铁磁共振

反铁磁体通常具有相当高的磁共振，称为反铁磁共振，其频率高达THz范围。它们是可磁耦合至太赫兹电磁波的少数材料之一，因此是太赫兹技术的重要材料。在这项工作中，我们证明了太赫兹共振特性，例如共振频率和$问$Ni可以通过在大范围内控制反铁磁性NiO的系数${}^{2+}$阳离子具有各种不同的阳离子。我们的讨论扩展到了不同取代阳离子Mn的趋势${}^{2+}$，李${}^{+}$和镁${}^{2+}$ 影响共振特性，这为设计反铁磁太赫兹材料提供了指导。