Intrinsic susceptibility and bond defects in the novel 2D frustrated antiferromagnet Ba₂Sn₂ZnCr₇ₚGa₁₀₋₇ₚO₂₂
Bono, David · Mendels, Philippe · Collin, Gaston · Blanchard, Nicole
Original · EN
We present microscopic and macroscopic magnetic properties of the highly frustrated antiferromagnet Ba₂Sn₂ZnCr₇ₚGa₁₀₋₇ₚO₂₂, respectively probed with NMR and SQUID experiments. The T-variation of the intrinsic susceptibility of the Cr³⁺ frustrated kagomé bilayer, χkag, displays a maximum around 45 K. The dilution of the magnetic lattice has been studied in detail for 0.29 ≤ p ≤0.97. Novel dilution independent defects, likely related with magnetic bond disorder, are evidenced and discussed. We compare our results to SrCr₉ₚGa₁₂₋₉ₚO₁₉. Both bond defects and spin vacancies do not affect the average susceptibility of the kagomé bilayers.
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