Abstract
Cu(NO3)2⋅H2O is a new S=1/2 system based on transition metal nitrates and contains two-dimensional Cu2+ (S=1/2) layers. We studied single crystalline samples by means of high field (HF) ESR and NMR. Cu2+ HF-ESR and 1H-NMR data reveal pronounced spin-spin correlations at temperatures much higher than the antiferromagnetic ordering temperature T N ∼3.6 K. These observations clearly suggest a two-dimensional character of magnetic interactions in Cu(NO3)2⋅H2O. We discuss the obtained results by considering the possible exchange paths between inequivalent Cu-sites in this compound.
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Yehia, M., Vavilova, E., Kataev, V. et al. High Field ESR Study of the New Low Dimensional S=1/2 System: Cu(NO3)2⋅H2O. J Low Temp Phys 159, 96–100 (2010). https://doi.org/10.1007/s10909-009-0090-x
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DOI: https://doi.org/10.1007/s10909-009-0090-x