Abstract
We report the effect of substitution of Cr by V and Mn in the spin- $\frac{1}{2}$ 1 2 dimer compound Sr3Cr2O8. In the pentavalent Cr site, V ion has zero effective moment, while Mn remains in the spin-1 state. For both V and Mn substitutions, the gap in the spin excitation spectra remains almost unchanged in the dilute doping regime. The low temperature Curie tail, expected to be originated from free or quasi-free magnetic ions, is found to be larger in case of V doped samples. However, inter-dimer interaction is found to be stronger in the Mn doped samples. The underlying magnetic behaviour of these doped samples is presumably related to the effect of broken dimers due to random substitutions.
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Chattopadhyay, S., Giri, S. & Majumdar, S. Magnetic behaviour of doped dimer compounds Sr3Cr2−x M x O8 (M = V, Mn). Eur. Phys. J. B 85, 4 (2012). https://doi.org/10.1140/epjb/e2011-20660-5
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DOI: https://doi.org/10.1140/epjb/e2011-20660-5