Soft x-ray magnetic circular dichroism study on Gd-doped EuO thin films
Soft x-ray magnetic circular dichroism study on Gd-doped EuO thin films
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DOI：
10.1103/physrevb.73.094407
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发表时间：
2005-09
影响因子：
3.7
通讯作者：
H. Ott;S. Heise;R. Sutarto;Z. Hu;C. F. Chang;H. Hsieh;H.J. Lin;C. Chen;L. Tjeng
中科院分区：
文献类型：
--
作者：
H. Ott;S. Heise;R. Sutarto;Z. Hu;C. F. Chang;H. Hsieh;H.J. Lin;C. Chen;L. Tjeng
我们报告了掺钆 $\mathrm{EuO}$ 薄膜的生长和磁性。我们在蒸馏条件下通过分子束外延制备了 Gd 浓度高达 11%$ 的样品。利用 Eu 和 Gd ${M}_{4,5}$ 边缘处的软 X 射线磁圆二色性，我们发现 ${T}_{C}$ 的范围从纯化学计量的 $69\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ 到大约 $170\phantom{\rule{0.3em}{0ex}}\mathrm{K}$对于最佳 Gd 掺杂约为 4%$ 的薄膜。已研究了 ${T}_{C}$ 的掺杂依赖性，并与可用的理论预测进行了比较。我们还表明，Gd 磁矩与 Eu 磁矩以铁磁方式耦合。
We report on the growth and magnetic properties of Gd-doped $\mathrm{EuO}$ thin films. We prepared samples with Gd concentrations up to $11%$ by means of molecular beam epitaxy under distillation conditions. Using soft x-ray magnetic circular dichroism at the Eu and Gd ${M}_{4,5}$ edges, we found that ${T}_{C}$ ranges from $69\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ for pure stoichiometric $\mathrm{EuO}$ to about $170\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ for films with the optimal Gd doping of around $4%$. The doping dependence of ${T}_{C}$ has been investigated and compared with available theoretical predictions. We also show that the Gd magnetic moment couples ferromagnetically to that of Eu.