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The natural mineral azurite Cu3(CO3)2(OH)2 is an interesting spin-1/2 quantumantiferromagnet. Recently, a generalised diamond chain model has beenestablished as a good description of the magnetic properties of azurite withparameters placing it in a highly frustrated parameter regime. Here we explorefurther properties of this model for azurite. First, we determine the inelasticneutron scattering spectrum in the absence of a magnetic field and find goodagreement with experiments, thus lending further support to the model.Furthermore, we present numerical data for the magnetocaloric effect andpredict that strong cooling should be observed during adiabatic(de)magnetisation of azurite in magnetic fields slightly above 30T. Finally,the presence of a dominant dimer interaction in azurite suggests the use ofeffective Hamiltonians for an effective low-energy description and we proposethat such an approach may be useful to fully account for the three-dimensionalcoupling geometry.

Dynamic and thermodynamic properties of the generalised diamond chain model for azurite