阻挫自旋系统RXS中的无公度磁基态
Incommensurate magnetic ground state revealed by RXS in the frustrated spin system Ca3Co2O6
摘要：
我们已经进行了共振X射线散射研究在钴前K边缘上的单晶Ca3Co2O6。测量结果表明，在T_N = 25 K以下，样品发生了向磁有序态的突变，沿c轴链的磁相关长度超过5500 μ m。没有证据表明Co $^{3+}$的自旋状态发生了变化。沿c轴的磁序的温度依赖调制和冷却时的磁相关长度的不寻常的减少进行了观察。结果是相容的部分无序的反铁磁结构在Ca3Co2O6的发病。
英文摘要：
We have performed a resonant x-ray scattering study at the Co pre-K edge on a single crystal of Ca3Co2O6. The measurements reveal an abrupt transition to a magnetically ordered state immediately below T_N = 25 K, with a magnetic correlation length in excess of 5500 Å along the c-axis chains. There is no evidence for modifications to the Co$^{3+}$ spin state. A temperature dependent modulation in the magnetic order along the c-axis and an unusual decrease in the magnetic correlation lengths on cooling are observed. The results are compatible with the onset of a partially disordered antiferromagnetic structure in Ca3Co2O6.
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