In a new paper by Ross et al, which appeared in Physical Review B this month as an Editor’s Suggestion, the magnetically frustrated pyrochlore materials NaCaCo2F7 and NaSrCo2F7 are shown to host anisotropic spins that are the most “quantum” they can be (spin 1/2).  This allows the materials to be treated within a well-known framework that describes quantum phenomena arising from this lattice geometry, and may enable an understanding of their unexpected spin freezing behavior.  The paper results from a collaboration of the Ross lab at CSU with the NIST Center for Neutron Research, Oak Ridge National Laboratory, and Princeton University.


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