Structural and magnetic properties of the quantum magnet BaCuTe2O6
| Autor: | D. J. Voneshen, Konrad Siemensmeyer, S. Chillal, A. Senyshyn, Dmitry D. Khalyavin, A. T. M. N. Islam, A. Samartzis, Bella Lake, Karel Prokes |
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| Rok vydání: | 2021 |
| Předmět: |
Physics
Condensed matter physics Magnetic structure Neutron diffraction Order (ring theory) 02 engineering and technology Cubic crystal system Quantum Materials 021001 nanoscience & nanotechnology 01 natural sciences Heat capacity Magnetic susceptibility 0103 physical sciences Antiferromagnetism Condensed Matter::Strongly Correlated Electrons Continuum (set theory) 010306 general physics 0210 nano-technology |
| Zdroj: | Physical Review B. 103 |
| ISSN: | 2469-9969 2469-9950 |
| DOI: | 10.1103/physrevb.103.094417 |
| Popis: | We investigate the structural and magnetic properties of the quantum magnet $\mathrm{Ba}\mathrm{Cu}{\mathrm{Te}}_{2}{\mathrm{O}}_{6}$. This compound is synthesized in powder and single crystal form for the first time. Synchrotron x-ray and neutron diffraction reveal a cubic crystal structure $(P{4}_{1}32)$ where the magnetic ${\mathrm{Cu}}^{2+}$ ions form a complex network. Heat capacity and static magnetic susceptibility measurements suggest the presence of antiferromagnetic interactions with a Curie-Weiss temperature of $\ensuremath{\approx}\ensuremath{-}33$ K, while long-range magnetic order occurs at the much lower temperature of $\ensuremath{\approx}6.3$ K. The magnetic structure, solved using neutron diffraction, reveals antiferromagnetic order along chains parallel to the $a,$ $b,$ and $c$ crystal axes. This is consistent with the magnetic excitations which resemble the multispinon continuum typical of the spin-1/2 Heisenberg antiferromagnetic chain. A consistent intrachain interaction value of $\ensuremath{\approx}34$ K is achieved from the various techniques. Finally the magnetic structure provides evidence that the chains are coupled together in a noncollinear arrangement by a much weaker antiferromagnetic, frustrated hyperkagome interaction. |
| Databáze: | OpenAIRE |
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