Crystal growth and magnetic properties of spin-$1/2$ distorted triangular lattice antiferromagnet CuLa$_2$Ge$_2$O$_8$
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| Autores principales: | , , , , , , , , , |
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| Formato: | Preprint |
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2026
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| author | Thamban, S. Aguilar-Maldonado, C. Chillal, S. Feyerherm, R. Prokeš, K. Studer, A. J. Abou-Ras, D. Karmakar, K. Islam, A. T. M. N. Lake, B. |
| author_facet | Thamban, S. Aguilar-Maldonado, C. Chillal, S. Feyerherm, R. Prokeš, K. Studer, A. J. Abou-Ras, D. Karmakar, K. Islam, A. T. M. N. Lake, B. |
| contents | CuLa$_2$Ge$_2$O$_8$ forms a distorted triangular lattice of quantum spin-1/2 Cu$^{2+}$ ions. A crystal growth method was developed using the traveling-solvent floating zone technique resulting in the synthesis of a large single crystal (4 mm$\times$4 mm$\times$10 mm). The crystal was characterized with regard to phase purity and crystallinity using powder X-ray diffraction, energy dispersive X-ray analysis and Laue diffraction, and found to be of excellent quality. The magnetic properties were characterized using dc-susceptibility, magnetization, and heat capacity measurements which revealed weak magnetic frustration with long-range magnetic order occurring below $T_N=1.14(1)$~K. The magnetic structure determined using neutron powder diffraction is a commensurate, noncollinear antiferromagnetic, different from the 120$^{\circ}$ order of an equilateral triangular antiferromagnet. The ordered moments lie in the {\bf bc}-plane, with components $m_b=0.50(3)$~$μ_{B}$ and $m_c= 0.73(5)$~$μ_{B}$ along the {\bf b}- and {\bf c}-axes respectively, giving a total ordered moment of $M_{total}$= 0.89(6)$μ_{B}/$Cu$^{2+}$ at 20~mK. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_05126 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Crystal growth and magnetic properties of spin-$1/2$ distorted triangular lattice antiferromagnet CuLa$_2$Ge$_2$O$_8$ Thamban, S. Aguilar-Maldonado, C. Chillal, S. Feyerherm, R. Prokeš, K. Studer, A. J. Abou-Ras, D. Karmakar, K. Islam, A. T. M. N. Lake, B. Strongly Correlated Electrons CuLa$_2$Ge$_2$O$_8$ forms a distorted triangular lattice of quantum spin-1/2 Cu$^{2+}$ ions. A crystal growth method was developed using the traveling-solvent floating zone technique resulting in the synthesis of a large single crystal (4 mm$\times$4 mm$\times$10 mm). The crystal was characterized with regard to phase purity and crystallinity using powder X-ray diffraction, energy dispersive X-ray analysis and Laue diffraction, and found to be of excellent quality. The magnetic properties were characterized using dc-susceptibility, magnetization, and heat capacity measurements which revealed weak magnetic frustration with long-range magnetic order occurring below $T_N=1.14(1)$~K. The magnetic structure determined using neutron powder diffraction is a commensurate, noncollinear antiferromagnetic, different from the 120$^{\circ}$ order of an equilateral triangular antiferromagnet. The ordered moments lie in the {\bf bc}-plane, with components $m_b=0.50(3)$~$μ_{B}$ and $m_c= 0.73(5)$~$μ_{B}$ along the {\bf b}- and {\bf c}-axes respectively, giving a total ordered moment of $M_{total}$= 0.89(6)$μ_{B}/$Cu$^{2+}$ at 20~mK. |
| title | Crystal growth and magnetic properties of spin-$1/2$ distorted triangular lattice antiferromagnet CuLa$_2$Ge$_2$O$_8$ |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2603.05126 |