Lake B, Aeppli G, Clausen K N, McMorrow D F, Lefmann K, Hussey N E, Mangkorntong N, Nohara M, Takagi H, Mason T E, Schröder A
Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.
Science. 2001 Mar 2;291(5509):1759-62. doi: 10.1126/science.1056986.
Neutron scattering is used to characterize the magnetism of the vortices for the optimally doped high-temperature superconductor La(2-x)Sr(x)CuO4 (x = 0.163) in an applied magnetic field. As temperature is reduced, low-frequency spin fluctuations first disappear with the loss of vortex mobility, but then reappear. We find that the vortex state can be regarded as an inhomogeneous mixture of a superconducting spin fluid and a material containing a nearly ordered antiferromagnet. These experiments show that as for many other properties of cuprate superconductors, the important underlying microscopic forces are magnetic.
中子散射被用于表征最佳掺杂高温超导体La(2-x)Sr(x)CuO4（x = 0.163）在施加磁场时涡旋的磁性。随着温度降低，低频自旋涨落首先随着涡旋迁移率的丧失而消失，但随后又重新出现。我们发现涡旋态可被视为超导自旋流体与包含近有序反铁磁体的材料的非均匀混合物。这些实验表明，与铜酸盐超导体的许多其他性质一样，重要的潜在微观力是磁性的。
