Rods of neutron scattering intensity in Yb2Ti2O7: compelling evidence for significant anisotropic exchange in a magnetic pyrochlore oxide.
Rods of neutron scattering intensity in Yb2Ti2O7: compelling evidence for significant anisotropic exchange in a magnetic pyrochlore oxide.
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DOI：
10.1103/physrevlett.106.187202
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发表时间：
2010-10
影响因子：
8.6
通讯作者：
Jordan Thompson;P. McClarty;H. Rønnow;L. Regnault;A. Sorge;M. Gingras
中科院分区：
文献类型：
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作者：
Jordan Thompson;P. McClarty;H. Rønnow;L. Regnault;A. Sorge;M. Gingras
用中子散射方法研究了磁性材料Yb（2）Ti（2）O（7）中的顺磁关联，发现了一个[111]散射强度棒。假设Yb（3+）离子之间的相互作用由所有的最近邻交换相互作用和长程偶极相互作用组成，我们构造了一个模型哈密顿量，它可以很好地描述中子散射数据。我们的研究结果提供了令人信服的证据，在绝缘的磁性烧绿石氧化物的显着各向异性交换相互作用。我们还计算了导致[111]散射棒的真实的空间相关。
Paramagnetic correlations in the magnetic material Yb(2)Ti(2)O(7) have been investigated via neutron scattering, revealing a [111] rod of scattering intensity. Assuming interactions between the Yb(3+) ions composed of all symmetry-allowed nearest neighbor exchange interactions and long-range dipolar interactions, we construct a model Hamiltonian that allows for an excellent description of the neutron scattering data. Our results provide compelling evidence for significant anisotropic exchange interactions in an insulating magnetic pyrochlore oxide. We also compute the real space correlations leading to the [111] rod of scattering.