Magnetic phase transition of ultrathin Fe films on Ag(111).
Magnetic phase transition of ultrathin Fe films on Ag(111).
复制标题
Ag(111) 上超薄 Fe 薄膜的磁相变。
作者：
Qiu;Pearson;Báder
用分子束外延技术在Fe的单层膜范围内生长了高质量的Fe（110）/Ag（111）单晶薄膜，并利用表面磁光克尔效应对薄膜进行了原位研究。在厚度依赖的居里温度下，磁化强度表现出二级相变。临界指数ensuremath的值{eta}为0.137ifmmodepmelse extpmfi{}0.008与二维Ising模型的结果吻合较好。
High-quality, single-crystalline films of Fe(110)/Ag(111) were grown by molecular-beam epitaxy in the range of ensuremath{sim}1char21{}3 monolayers of Fe, and investigated in situ by means of the surface magneto-optic Kerr effect. The magnetization exhibits a second-order phase transition at the thickness-dependent Curie temperature. The value of the critical exponent ensuremath{eta} of 0.137ifmmodepmelse extpmfi{}0.008 is in good agreement with that of the two-dimensional Ising model.