Structural and magnetic properties of the new quantum magnet BaCuTe${}_2$O${}_6$

Abstract

We investigate the structural and magnetic properties of the new quantum magnet BaCuTe${}_2$O${}_6$. This compound is synthesized for the first time in powder and single crystal form. Synchrotron X-ray and neutron diffraction reveal a cubic crystal structure (P4${}_1$32) where the magnetic Cu${}^{2+}$ ions form a complex network. Physical properties measurements suggest the presence of antiferromagnetic interactions with a Curie-Weiss temperature of -33K, while long-range magnetic order occurs at the much lower temperature of ~6.3K. 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 ~34K is achieved from the various techniques. Finally the magnetic structure provides evidence that the chains are coupled together in a non-colinear arrangement by a much weaker antiferromagnetic, frustrated hyperkagome interaction.

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Cited by in corpus (5)

• Spin Hall and Edelstein Effects in Novel Chiral Noncollinear Altermagnets
• Nonlinear Magnetoelectric Effect under Magnetic Octupole Order: Its Application to a $d$-Wave Altermagnet and a Pyrochlore Lattice with All-In/All-Out Magnetic Order
• Low-dimensional magnetism of BaCuTe${}_2$O${}_6$
• Generation of Pure Spin Current with Insulating Antiferromagnetic Materials
• Magnetic excitation spectrum and Hamiltonian of the quantum spin chain BaCuTe2O6