Strong edge-induced ferromagnetism in sputtered MoS2 film treated by post-annealing
Strong edge-induced ferromagnetism in sputtered MoS2 film treated by post-annealing
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DOI：
10.1063/1.5118913
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发表时间：
2019-11
影响因子：
4
通讯作者：
Takanori Shirokura;I. Muneta;K. Kakushima;K. Tsutsui;H. Wakabayashi
中科院分区：
文献类型：
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作者：
Takanori Shirokura;I. Muneta;K. Kakushima;K. Tsutsui;H. Wakabayashi
我们报道了具有长全边长度的溅射二硫化钼(MoS_2)薄膜的边缘感生铁磁性，其结晶度的改善包括硫蒸气的边缘重构和Ar的退火热处理。通过退火，观察到了很强的边缘感生铁磁性，其饱和磁化强度为13-26emu/cc，比已报道的边缘感生铁磁性的化学气相沉积样品的饱和磁化强度大。两种退火工艺都提高了溅射MoS_2薄膜的结晶度，而氩气退火显著提高了薄膜的铁磁性。我们得出结论，硫化和氩退火对薄膜铁磁性增强的不同是由边缘重构形状引起的，而边缘重构形状依赖于硫的化学势。我们报道了具有较长全边缘长度的溅射二硫化钼(MoS_2)薄膜的边缘感生铁磁性，其结晶度的改善包括硫蒸气的边缘重构和氩退火。通过退火，观察到了很强的边缘感生铁磁性，其饱和磁化强度为13-26emu/cc，比已报道的边缘感生铁磁性的化学气相沉积样品的饱和磁化强度大。两种退火工艺都提高了溅射MoS_2薄膜的结晶度，而氩气退火显著提高了薄膜的铁磁性。我们得出结论，硫化和氩退火对铁磁性增强的不同归因于边缘重构形状，而边缘重构形状取决于硫的化学势。
We report edge-induced ferromagnetism in a sputtered molybdenum disulfide (MoS2) film having a long whole-edge length, with the effects of crystallinity improvement including edge reconstruction by sulfur vapor and argon annealing. Strong edge-induced ferromagnetism was observed by annealing, and its saturation magnetization of 13–26 emu/cc was larger than that of a chemical-vapor deposition sample with edge-induced ferromagnetism, as reported previously. Whereas both the annealing steps improved the crystallinity of the sputtered MoS2 film, argon annealing significantly enhanced the ferromagnetism. We conclude that the difference of the ferromagnetism enhancement between the sulfur and argon annealing steps is attributed to the edge reconstruction shape, which depends on the sulfur chemical potential.We report edge-induced ferromagnetism in a sputtered molybdenum disulfide (MoS2) film having a long whole-edge length, with the effects of crystallinity improvement including edge reconstruction by sulfur vapor and argon annealing. Strong edge-induced ferromagnetism was observed by annealing, and its saturation magnetization of 13–26 emu/cc was larger than that of a chemical-vapor deposition sample with edge-induced ferromagnetism, as reported previously. Whereas both the annealing steps improved the crystallinity of the sputtered MoS2 film, argon annealing significantly enhanced the ferromagnetism. We conclude that the difference of the ferromagnetism enhancement between the sulfur and argon annealing steps is attributed to the edge reconstruction shape, which depends on the sulfur chemical potential.