Details

Autor(en) / Beteiligte

• Zhong, Jin-Qun
• Yu, Zhen-Wei
• Yue, Xiao-Yu
• Wang, Yi-Yan
• Liang, Hui
• Sun, Yan
• Wu, Dan-Dan
• Ding, Zong-Ling
• Sun, Jin
• Sun, Xue-Feng
• Li, Qiu-Ju

Titel

Strong spin frustration and magnetism in kagomé antiferromagnets LnCu 3 (OH) 6 Br 3 (Ln = Nd, Sm, and Eu)

Ist Teil von

• Chinese physics B, 2023-04, Vol.32 (4), p.47505

Erscheinungsjahr

2023

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• To study the effects of lanthanide ions on the geometrically frustrated antiferromagnets and their magnetic properties, we grew high-quality single crystals of Ln Cu 3 (OH) 6 Br 3 ( Ln = Nd, Sm, and Eu) by hydrothermal method and studied their crystal structures and magnetic properties. The refinements of the crystal structure referred to the powder x-ray diffraction data show that Ln Cu 3 (OH) 6 Br 3 adopt a Kapellasite-type layer structure, which is isostructural to their chlorine analogue. Magnetic susceptibilities demonstrate that Ln Cu 3 (OH) 6 Br 3 have strong antiferromagnetic coupling and a pronounced magnetic frustration effect. Magnetization measurements indicate canted antiferromagnetic ordering of Cu 2+ ions around 16 K within the kagomé plane and weak ferromagnetic coupling. Moreover, shoulder-like anomalies in specific heat around 16 K could be a signature of emergent of magnetic ordering. The low-temperature negative magnetization and specific heat of Ln Cu 3 (OH) 6 Br 3 ( Ln = Nd, Sm, and Eu) indicate that Ln 3+ ions induce more exotic magnetic ground state properties.