Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2010-10-26
Phys. Rev. B 83, 104401 (2011)
Physics
Condensed Matter
Strongly Correlated Electrons
9 pages, 8 figures, 3 tables
Scientific paper
Here we present neutron diffraction results on the mineral azurite. We have found that the crystal structure of azurite can be described in the space group $P2_1$ which is the next lower symmetric group of $P2_1/c$ as found in earlier work. This small change in symmetry does not greatly influence the lattice parameters or atomic fractional coordinates which are presented here for single crystal diffraction refinements. The ordered magnetic moment structure of this material has been determined and is comprised of two inequivalent magnetic moments on copper sites of magnitude 0.68(1) and 0.25(1) $\mu_{B}$. This result is discussed in terms of the anisotropic exchange and Dzyaloshinskii-Moriya interactions. It is found that the system is likely governed by one-dimensional behaviour despite the long-range ordered ground state. We also highlight the significance of strain in this material which is strongly coupled to the magnetism.
Gerischer S.
Gibson M. C. R.
Gutmann Matthias J.
Hoffmann J.-U.
Lang Martin
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