Incommensurate geometry of the elastic magnetic peaks in superconducting La1.88Sr0.12CuO4
Incommensurate geometry of the elastic magnetic peaks in superconducting La1.88Sr0.12CuO4
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DOI：
10.1103/physrevb.61.14366
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发表时间：
2000-06-01
影响因子：
3.7
通讯作者：
Birgeneau, RJ
中科院分区：
文献类型：
--
作者：
Kimura, H;Matsushita, H;Birgeneau, RJ
本文报道了La1.88Sr0.12CuO4超导单晶中不相称磁序的磁中子散射测量。我们发现描述静态磁性的不相称波矢量并不沿着下面的CuO2晶格的高对称方向。弹性磁峰的位置与过量氧掺杂La2CuO4+y中发现的位置一致。这种行为不同于在低温四边形LB1.6-xNd0.4SrxCuO4材料中发现的精确磁顺序，在LB1.6-xNd0.4SrxCuO4材料中观察到自旋和电荷的条纹。这些观察结果对任何用于描述正交la2cuo4基超导体静态磁性的条纹模型都有明确的意义。
We report magnetic neutron-scattering measurements of incommensurate magnetic order in a superconducting single crystal of La1.88Sr0.12CuO4. We find that the incommensurate wave vectors which describe the static magnetism do not lie along high-symmetry directions of the underlying CuO2 lattice. The positions of the elastic magnetic peaks are consistent with those found in excess-oxygen doped La2CuO4+y. This behavior differs from the precise magnetic order found in the low-temperature tetragonal LB1.6-xNd0.4SrxCuO4 material for which stripes of spin and charge have been observed. These observations have clear implications for any stripe model proposed to describe the static magnetism in orthorhombic La2CuO4-based superconductors.