Low-temperature muon spin rotation studies of the monopole charges and currents in Y doped Ho2Ti2O7.

Low-temperature muon spin rotation studies of the monopole charges and currents in Y doped Ho2Ti2O7.
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在掺杂的HO2TI2O7中,单极电荷和电流的低温MUON自旋旋转研究。

DOI:
10.1038/srep01881
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发表时间:
2013
期刊:
影响因子:
4.6
通讯作者:
Hillier, A. D.
Hillier, A. D.
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Chang, L. J.;Lees, M. R.;Balakrishnan, G.;Kao, Y. -J.;Hillier, A. D.

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在Ho_2Ti_2O_7自旋冰的基态,磁矩的无序遵循与水冰中质子无序相同的规律。激发采用磁单极子的形式,其通过磁库仑相互作用相互作用。μ子自旋旋转被用来探测单晶Ho 2 −xYxTi2O7(x = 0、0.1、1、1.6和2)的低温磁性行为。在非常低的温度下,在x = 0和0.1的样品中观察到μ子进动弛豫速率λ(B)与场的线性关系,在以前的一些实验中,Dy2Ti2O7自旋冰与π电流有关。由于晶体的磁化,从磁场穿透到银样品板的信号被观察到的所有样品含有Ho,使我们能够研究不寻常的磁性动力学的Y掺杂自旋冰。
In the ground state of Ho2Ti2O7 spin ice, the disorder of the magnetic moments follows the same rules as the proton disorder in water ice. Excitations take the form of magnetic monopoles that interact via a magnetic Coulomb interaction. Muon spin rotation has been used to probe the low-temperature magnetic behaviour in single crystal Ho2−xYxTi2O7 (x = 0, 0.1, 1, 1.6 and 2). At very low temperatures, a linear field dependence for the relaxation rate of the muon precession λ(B), that in some previous experiments on Dy2Ti2O7 spin ice has been associated with monopole currents, is observed in samples with x = 0, and 0.1. A signal from the magnetic fields penetrating into the silver sample plate due to the magnetization of the crystals is observed for all the samples containing Ho allowing us to study the unusual magnetic dynamics of Y doped spin ice.
DOI: 10.1038/nphys1896
发表时间: 2011-03-01
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