Magnetic structure of Ba(TiO)Cu${}_4$(PO${}_4$)${}_4$ probed using spherical neutron polarimetry

Abstract

The antiferromagnetic compound Ba(TiO)Cu${}_4$(PO${}_4$)${}_4$ contains square cupola of corner-sharing CuO${}_4$ plaquettes, which were proposed to form effective quadrupolar order. To identify the magnetic structure, we have performed spherical neutron polarimetry measurements. Based on symmetry analysis and careful measurements we conclude that the orientation of the Cu${}^{2+}$ spins form a non-collinear in-out structure with spins approximately perpendicular to the CuO${}_4$ motif. Strong Dzyaloshinskii-Moriya interaction naturally lends itself to explain this phenomenon. The identification of the ground state magnetic structure should serve well for future theoretical and experimental studies into this and closely related compounds.

arXiv comment9 pages, 4 figures

References in corpus (3)

• Covalent bonding and magnetism in cuprates
• Magnetodielectric detection of magnetic quadrupole order in Ba(TiO)Cu${}_4$(PO${}_4$)${}_4$ with Cu${}_4$O${}_{12}$ square cupolas
• Magnetoelectric Behavior from $S=1/2$ Asymmetric Square Cupolas

Cited by in corpus (8)

• Frustration of square cupola in Sr(TiO)Cu${}_4$(PO${}_4$)${}_4$
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• Magnetoelectric spectroscopy of spin excitations in LiCoPO4
• Magnetic structure in square cupola compound Ba(TiO)Cu${}_4$(PO${}_4$)${}_4$: a ${}^{31}$P NMR Study
• Spin-1/2 $XXZ$ Heisenberg cupolae: magnetization process and related enhanced magnetocaloric effect
• The spin-1/2 coupled tetramer system Ba(TiO)Cu${}_4$(PO${}_4$)${}_4$ probed by magnetization, specific heat, and ${}^{31}$P-NMR
• High-field phase diagram of the chiral-lattice antiferromagnet Sr(TiO)Cu4(PO4)4
• Spin dynamics in the square-lattice cupola system Ba(TiO)Cu${}_4$(PO${}_4$)${}_4$