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arXiv 0808.0106cond-mat.str-el
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用中子散射研究La2-xSrxCoO4中的磁关联:条纹相的可能证据

Magnetic correlations in La2-xSrxCoO4 studied by neutron scattering : possible evidence for stripe phases

M. Cwik, M. Benomar, T. Finger, Y. Sidis, D. Senff, T. Lorenz, M. Braden

摘要:

用中子散射研究了LSCO中的自旋关联。相称的反铁磁秩序的母体化合物持续在一个非常短的范围内的Sr含量x=0.3,而少量的Sr抑制相称的反铁磁性铜酸盐和镍酸盐。对于x>0.3,我们发现与调制紧密跟随掺杂量的无公度自旋有序。这些无公度相强烈类似于铜酸盐和镍酸盐中观察到的条纹相,但无公度磁有序只出现在较大的Sr含量的钴酸盐由于减少的电荷迁移率。

英文摘要:

Spin correlations in LSCO have been studied by neutron scattering. The commensurate antiferromagnetic order of the parent compound persists on a very short range up to a Sr content of x=0.3, whereas small amounts of Sr suppress commensurate antiferromagnetism in cuprates and in nickelates. For x>0.3 we find incommensurate spin ordering with the modulation closely following the amount of doping. These incommensurate phases strongly resemble the stripe phases observed in cuprates and nickelates, but incommensurate magnetic ordering appears only at larger Sr content in the cobaltates due to a reduced charge mobility.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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