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Resonant X-ray Scattering and neutron diffraction investigation of Ca3Co2O6 : ground state determination of a frustrated low dimensional magnetic system

Claudio Mazzoli, ESRF Grenoble


Resonant Magnetic X-Ray Scattering (RMXS) and Neutron Powder diffraction techniques have been exploited to investigate single crystals of Ca3Co2O6, a geometrically frustrated low dimensional antiferromagnet. The fundamental interest focused on this system in recent years comes from both the unusual ground state and the peculiar phase diagram. The former, still matter of debate, up to now was best described by a partially disordered antiferromagnetic state (PDA). The latter has been investigated with several techniques, evidencing the presence of puzzling steps in the magnetization at low temperature.

 

RMXS and PND investigations have given a new picture of the ground state and proposed a new exchange pattern. As a result, a whole new description of the system is available and it poses new and strong constrains to accepted theoretical models.

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