Red arrows represent electron spin orientations in a portion of the YbMgGaO4 crystal structure, where antiferromagnetic interactions between groups of magnetic moments cause neighboring spins to align anti-parallel to one another. This mechanism is partially responsible for the quantum spin liquid behavior observed in the neutron scattering data, illustrated on the hexagonal tiles. (Image credit: ORNL/Jill Hemman)
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<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/oakridgelab/32206462514/">Crystal structure</a>