Nature of the magnetic order in Ca3Co2O6

被引：138

作者：

Agrestini, S. ^{[1
]}

Chapon, L. C. ^{[2
]}

Daoud-Aladine, A. ^{[2
]}

Schefer, J. ^{[3
,4
]}

Gukasov, A. ^{[5
]}

Mazzoli, C. ^{[6
]}

Lees, M. R. ^{[1
]}

Petrenko, O. A. ^{[1
]}

机构：

[1] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England

[2] Rutherford Appleton Lab, ISIS Facil, Chilton OX11 0QX, England

[3] ETH, Neutron Scattering Lab, CH-5232 Villigen, PSI, Switzerland

[4] Paul Scherrer Inst, CH-5232 Villigen, PSI, Switzerland

[5] CEA Saclay, CNRS, CEA, Lab Leon Brillouin, F-91191 Gif Sur Yvette, France

[6] European Synchrotron Radiat Facil, F-38043 Grenoble 9, France

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 09期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1103/PhysRevLett.101.097207

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present a detailed powder and single-crystal neutron diffraction study of the spin chain compound Ca3Co2O6. Below 25 K, the system orders magnetically with a modulated partially disordered antiferromagnetic structure. We give a description of the magnetic interactions in the system which is consistent with this magnetic structure. Our study also reveals that the long-range magnetic order coexists with a shorter-range order with a correlation length scale of similar to 180 angstrom in the ab plane. Remarkably, on cooling, the volume of material exhibiting short-range order increases at the expense of the long-range order.

引用

页数：4

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