Stripeless incommensurate magnetism in strongly correlated oxide La1.5Sr0.5CoO4

被引：20
|
作者：
Savici, A. T. [1 ]
Zaliznyak, I. A.
Gu, G. D.
Erwin, R.
机构：
[1] Brookhaven Natl Lab, DCMPMS, Upton, NY 11973 USA
[2] Natl Inst Stand & Technol, NCNR, Gaithersburg, MD 20899 USA
来源：
PHYSICAL REVIEW B | 2007年 / 75卷 / 18期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1103/PhysRevB.75.184443
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We studied the nanoscale structure of the short-range incommensurate magnetic order in La1.5Sr0.5CoO4 by elastic neutron scattering. We find that magnetic diffuse scattering is isotropic in the a-b plane, in contrast with the naive expectation based on the popular stripe model. Indeed, charge segregation into lines favoring certain lattice direction(s) would facilitate linear stacking faults in an otherwise robust antiferromagnetism of undoped material, leading to anisotropic disorder with a characteristic symmetry pattern present in the neutron scattering data.
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页数：7
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