Evidence for Two-Dimensional Spin-Glass Ordering in Submonolayer Fe Films on Cleaved InAs Surfaces
Evidence for Two-Dimensional Spin-Glass Ordering in Submonolayer Fe Films on Cleaved InAs Surfaces
复制标题
DOI：
10.1103/physrevlett.101.267204
复制
发表时间：
2008-12-31
影响因子：
8.6
通讯作者：
Okamoto, Tohru
中科院分区：
文献类型：
--
作者：
Mochizuki, Toshimitsu;Masutomi, Ryuichi;Okamoto, Tohru
磁输运测量已经进行了二维电子气形成的InAs（110）表面覆盖的Fe亚单层。磁滞的磁阻，零场冷却程序和场冷却程序之间的reflux磁阻的差异，和对数随时间变化的弛豫磁场扫描后，清楚地观察到在1.7 K的覆盖率为0.42单层。这些特征与Fe膜中的自旋玻璃有序有关。
Magnetotransport measurements have been performed on two-dimensional electron gases formed at InAs(110) surfaces covered with a submonolayer of Fe. Hysteresis in the magnetoresistance, a difference in remanent magnetoresistance between zero-field-cooling procedures and field-cooling procedures, and logarithmic time-dependent relaxation after magnetic field sweep are clearly observed at 1.7 K for a coverage of 0.42 monolayer. These features are associated with spin-glass ordering in the Fe film.