Observation of spontaneous x-ray magnetic circular dichroism in a chiral antiferromagnet
Observation of spontaneous x-ray magnetic circular dichroism in a chiral antiferromagnet
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DOI：
10.1103/physrevb.104.134431
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发表时间：
2021-10
影响因子：
3.7
通讯作者：
S. Sakamoto;T. Higo;M. Shiga;K. Amemiya;S. Nakatsuji;S. Miwa
中科院分区：
文献类型：
--
作者：
S. Sakamoto;T. Higo;M. Shiga;K. Amemiya;S. Nakatsuji;S. Miwa
反铁磁体中通常不存在 X 射线磁圆二色性 (XMCD) 信号。在这封信中，我们报告了手性反铁磁体 Mn3Sn 薄膜中源自反三角自旋结构或簇磁性八极子极化的自发 XMCD 光谱的观察。该结果与最近的理论预测一致，即逆三角形自旋结构可以在没有净磁化强度的情况下产生有限的 XMCD 信号 [J.物理。苏克。日本。 89, 083703 (2020) 和 Phys。莱特牧师。 126, 157402 (2021)]。 1 ar X iv :2 11 1. 05 46 5v 1 [ cond -m at .m tr lsc i] 1 0 N ov 2 02 1
X-ray magnetic circular dichroism (XMCD) signals are usually absent in antiferromagnets. In this letter, we report the observation of spontaneous XMCD spectra originating from the inverse triangular spin structure, or the polarization of the cluster magnetic octupole, in the chiral antiferromagnet Mn3Sn thin film. The result is consistent with the recent theoretical predictions that the inverse triangular spin structure can give rise to finite XMCD signals in the absence of net magnetization [J. Phys. Soc. Jpn. 89, 083703 (2020) and Phys. Rev. Lett. 126, 157402 (2021)]. 1 ar X iv :2 11 1. 05 46 5v 1 [ co nd -m at .m tr lsc i] 1 0 N ov 2 02 1