Negative-chirality order in $S=1/2$ kagome antiferromagnet CdCu$_{3}$(OH)$_{6}$(NO$_{3}$)$_{2}\cdot $H$_{2}$O

Yoshihiko Ihara; Ryoga Hiyoshi; Masakazu Shimohasi; Kaoru Hayashi; Ryutaro Okuma; Gøran Nilsen; Zenji Hiroi

doi:10.1103/PhysRevB.106.024401

paper

Negative-chirality order in $S = 1/2$ kagome antiferromagnet CdCu $_{3}$ (OH) $_{6}$ (NO $_{3}$ ) $_{2} \cdot$ H $_{2}$ O

arXiv:2204.02621 · doi:10.1103/PhysRevB.106.024401

Abstract

The neutron diffraction and nuclear magnetic resonance (NMR) measurements have been used to microscopically analyze the magnetic structure in the $S = 1/2$ kagome antiferromagnet CdCu $_{3}$ (OH) $_{6}$ (NO $_{3}$ ) $_{2} \cdot$ H $_{2}$ O. Below the magnetic ordering temperature $T_{N} ≃ 4$ K, magnetic Bragg reflections at (110) and (100) were found in the neutron diffraction pattern, which suggests a $q = 0$ magnetic structure. Furthermore, the vector spin chirality for the $q = 0$ structure was successfully identified from the internal field direction obtained by the $^{14}$ N-NMR measurement. Our findings point to a chirality-ordered magnetic structure with negative vector chirality and $⟨ 100 ⟩$ anisotropy.

6 pages, 5 figures

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Negative-chirality order in S=1/2 kagome antiferromagnet CdCu3​(OH)6​(NO3​)2​⋅H2​O

Abstract

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Negative-chirality order in $S = 1/2$ kagome antiferromagnet CdCu $_{3}$ (OH) $_{6}$ (NO $_{3}$ ) $_{2} \cdot$ H $_{2}$ O