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Incommensurate magnetic ground state revealed by resonant x-ray scattering in the frustrated spin system Ca3Co2O6

DOI: 10.1103/PhysRevB.77.140403 DOI Help

Authors: S. Agrestini (ENSICAEN) , A. Bombardi (Diamond Light Source) , M. R. Lees (University of Warwick) , C. Mazzoli (ESRF)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review B , VOL 77 (14) , PAGES 100406

State: Published (Approved)
Published: April 2008

Abstract: We have performed a resonant x-ray scattering study at the Co pre-K edge on a single crystal of Ca3Co2O6. The measurements reveal an abrupt transition to a magnetically ordered state immediately below TN=25 K, with a magnetic correlation length in excess of 5500 Å along the c axis chains. There is no evidence for modifications to the Co3+ spin state. A temperature dependent modulation in the magnetic order along the c axis and an unusual decrease in the magnetic correlation lengths on cooling are observed. The results are compatible with the onset of a partially disordered antiferromagnetic structure in Ca3Co2O6

Subject Areas: Physics, Materials


Instruments: NONE-No attached Diamond beamline

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