1/3-火、2/3-冰亚铁磁体SmMn$_2$Ge$_2$中具有太赫兹尝试频率的量子自旋弛豫
Quantum Spin Relaxation with THz Attempt Frequency in the 1/3-Fire, 2/3-Ice Ferrimagnet SmMn$_2$Ge$_2$
AI总结：
本研究在1/3-火、2/3-冰亚铁磁材料SmMn$_2$Ge$_2$中发现新型单自旋共振，通过交流磁化率测得类德拜共振的Orbach弛豫特性与太赫兹尝试频率，证实该弛豫源于畴界Mn自旋提供翻转场的Sm顺磁自旋，为奇异磁基态研究提供实验支撑。
摘要：
其中一半自旋无序、一半自旋有序的亚铁磁体（即所谓半火半冰态），在理论上被提出是实现奇异磁性基态的一种途径。本文中，我们在1/3-火、2/3-冰材料SmMn$_2$Ge$_2$中观测到了新型单自旋共振。通过0.1 Hz–1 kHz频率范围内的交流磁化率测量，我们发现了具有Orbach弛豫温度依赖特性的类德拜共振，得到能垒$E_B \approx 840$ $k_B$，且尝试频率处于太赫兹范围。这些结果强烈表明，单自旋弛豫发生在顺磁性Sm自旋之间，其翻转场由畴界处铁磁有序的Mn自旋提供，这是1/3-火、2/3-冰态的直接结果。
英文摘要：
Ferrimagnets in which half the spins are disordered and half ordered, so-called half-fire, half-ice state, have been advanced theoretically as a route towards realizing exotic magnetic ground states. Here we demonstrate novel single-spin resonance in SmMn$_2$Ge$_2$, a 1/3-fire, 2/3-ice material. Using ac-susceptibility in the frequency range 0.1 Hz - 1 kHz we find a Debye-like resonance with Orbach relaxation temperature dependence, yielding an energy barrier $E_B \approx 840$ $k_B$ and attempt frequencies in the THz range. These quantities strongly suggest single-spin relaxation among paramagnetic Sm spins where the flipping field is provided by the FM-ordered Mn spins at domain boundaries, a direct outcome of the 1/3-fire, 2/3-ice state.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
