Chirality and magnetic quadrupole order in Pb(TiO)Cu4(PO4)4 probed by interference scattering in resonant x-ray diffraction
Chirality and magnetic quadrupole order in Pb(TiO)Cu4(PO4)4 probed by interference scattering in resonant x-ray diffraction
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通过共振 X 射线衍射中的干涉散射探测 Pb(TiO)Cu4(PO4)4 中的手性和磁性四极级
DOI：
10.1103/physrevb.103.174409
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发表时间：
2021
影响因子：
3.7
通讯作者：
and T. Kimura
中科院分区：
文献类型：
--
作者：
R. Misawa;H. Ueda;K. Kimura;Y. Tanaka;and T. Kimura
本文研究了手性反铁磁体的圆二色性，用共振x射线衍射观察到的圆二色性在边缘处，它表现为磁四极级。在温度以上，由于各向异性磁化率张量（ATS）散射，观察到空间群禁止反射100。随着温度的降低，反射强度显示出下面的实质性圆二色性。我们发现圆二色性的符号和样品的晶体学手性的符号之间存在一一对应关系。此外，反射强度取决于极化磁场和电场的乘积。在这项研究中观察到的圆二色性被解释为ATS和磁散射之间的干扰。这一发现表明，干涉散射探针的手征性和磁四极序的序参数在这种手征反铁磁体。
Circular dichroism observed by resonant x-ray diffraction at theedge was investigated in a chiral antiferromagnet,, which shows magnetic quadrupole order. At temperatures above, space-group-forbidden reflection 100 is observed due to the anisotropic tensor of susceptibility (ATS) scattering. With decreasing temperature, the reflection intensity shows substantial circular dichroism below. We found one-to-one correspondence between the sign of the circular dichroism and that of the sample's crystallographic chirality. In addition, the reflection intensity depends on the product of poling magnetic and electric fields. The circular dichroism observed in this study is interpreted as the interference between the ATS and the magnetic scatterings. This finding shows that the interference scattering probes both the chirality and the order parameter of the magnetic quadrupole order in this chiral antiferromagnet.