Magnetic dimer excitations in azurite
The natural mineral azurite (Cu3(CO3)2(OH)2) has been proposed as a candidate model of the distorted diamond chain. Magnetisation measurements have revealed a characteristic 1/3 plateau, that is the signature of a spin fluid phase within this model. However, the ratio and sign of the exchange couplings, describing the magnetic nature of azurite, are still under much debate. Previous inelastic neutron scattering experiments have shown a complex excitation spectrum where there are signatures of both dimer and monomer spins, that could not be described using a simple 1d Heisenberg antiferromagnetic chain model. Here we propose to study the excitation spectrum of azurite in more detail using both polarised and unpolarised neutrons in hope of answering some of the open questions regarding the spin dynamics in this system.
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HANSEN Ursula Bengaard; ENDERLE Mechthild; R. K. Kremer and LEFMANN Kim. (2018). Magnetic dimer excitations in azurite. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.4-05-704
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