固体表面におけるナノ磁性体の実験

概要

論文の詳細を見る
Recently, ferromagnetic nanostructures have been prepared by well-controlled methods using self-organization at surfaces. Their magnetic and electronic properties are experimentally in situ studied with newly developed methods. In this article, results on the nanowires along the step edges on vicinal surfaces of nonmagnetic metals and on the regular arrays of nanodots on strain relief surface nanopatterns are reviewed. Both nanowires and nanodots show magnetic hysteresis loops as measured macroscopically by magneto-optical Kerr effect. When the magnetic nanostructure is isolated, the hysteresis is caused by the blocking of superparamagnetism at low temperatures. In the case of regular arrays of nanowires and nanodots, a long range magnetic order is established by both the percolation mechanism and the magnetic coupling among them. The microscopic interaction and the magnetic nanodomains have been clarified by spin-resolved scanning tunneling microscopy.
日本真空協会の論文
2006-12-20