Muon spin relaxation investigation of the spin dynamics of geometrically frustrated antiferromagnets Y2Mo2O7 and Tb2Mo2O7.
Muon spin relaxation investigation of the spin dynamics of geometrically frustrated antiferromagnets Y2Mo2O7 and Tb2Mo2O7.
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DOI：
10.1103/physrevb.54.9019
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发表时间：
1996-10
期刊：
影响因子：
--
通讯作者：
Dunsiger;Kiefl;Chow;Gaulin;Gingras;Greedan;Ke-ren;Kojima;Luke;Macfarlane;Raju;Sonier;Uemura;Wu
中科院分区：
文献类型：
--
作者：
Dunsiger;Kiefl;Chow;Gaulin;Gingras;Greedan;Ke-ren;Kojima;Luke;Macfarlane;Raju;Sonier;Uemura;Wu
使用μ子自旋弛豫研究了几何受挫烧绿石反铁磁体Y2Mo2O7和Tb2Mo2O7的自旋动力学。当从上方接近自旋冻结温度（TF 分别为 22 K 和 25 K）时，力矩波动会急剧减慢。低于 TF 时，存在类似于自旋玻璃中的无序磁态，但在低温下具有残余μ子自旋弛豫率。这些结果表明，在这些接近零能量的系统中，存在很大的磁激发态密度。
The spin dynamics of geometrically frustrated pyrochlore antiferromagnets Y2Mo2O7 and Tb2Mo2O7 have been investigated using muon spin relaxation. A dramatic slowing down of the moment fluctuations occurs as one approaches the spin freezing temperatures (TF=22 K and 25 K respectively) from above. Below TF there is a disordered magnetic state similar to that found in a spin glass but with a residual muon spin relaxation rate at low temperatures. These results show that there is a large density of states for magnetic excitations in these systems near zero energy.