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arXiv · 0801.2495

Incommensurate magnetic ground state revealed by RXS in the frustrated spin system Ca3Co2O6

S. Agrestini·C. Mazzoli·A. Bombardi·M. R. Lees
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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 T_N = 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 Co$^{3+}$ 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.

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S. Agrestini, C. Mazzoli, A. Bombardi, M. R. Lees. 2008-01-16. Incommensurate magnetic ground state revealed by RXS in the frustrated spin system Ca3Co2O6. https://doi.org/10.1103/physrevb.77.140403

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