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

被引：71
作者：
Agrestini, S. [1 ]
Mazzoli, C. [2 ]
Bombardi, A. [3 ]
Lees, M. R. [1 ]
机构：
[1] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England
[2] European Synchrotron Radiat Facil, F-38043 Grenoble, France
[3] Rutherford Appleton Lab, Diamond Light Source Ltd, Didcot OX11 0QX, Oxon, England
来源：
PHYSICAL REVIEW B | 2008年 / 77卷 / 14期
关键词：
D O I：
10.1103/PhysRevB.77.140403
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We have performed a resonant x-ray scattering study at the Co pre-K edge on a single crystal of Ca(3)Co(2)O(6). 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 A 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 Ca(3)Co(2)O(6).
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