Title :
Changes of morphology, structure, and magnetism of Fe on stepped Cu(111)
Author :
Klaua, M. ; Shen, J. ; Ohresser, Ph. ; Jenniches, H. ; Barthel, J. ; Mohan, Ch.V. ; Kirschner, J.
Author_Institution :
Max-Planck-Inst. fur Mikrostrukturphys., Halle, Germany
fDate :
7/1/1998 12:00:00 AM
Abstract :
We have studied the morphology, structure and magnetism of Fe films thermally deposited on stepped Cu(111) by scanning tunnelling microscopy (STM), low energy electron diffraction (LEED) and magneto-optical Kerr effect (MOKE). At room temperature, in the submonolayer range Fe films grow as quasi one-dimensional stripes along the upper step edges due to a strong decoration effect. Between 1.4 and 1.8 monolayer coverage the stripes percolate and become two-dimensional films. Between 2.3 and 2.7 monolayer coverage the films undergo a structural transition from fcc(111) to bcc(110) with Kurdjumov-Sachs orientation. In the fcc range the films have a low net magnetic moment, and a perpendicular easy magnetization axis. The magnetization switches to an in-plane high-moment phase correlated with the fcc to bcc structural transformation
Keywords :
Kerr magneto-optical effect; copper; ferromagnetic materials; interface structure; iron; low energy electron diffraction; magnetic thin films; perpendicular magnetic anisotropy; scanning tunnelling microscopy; solid-state phase transformations; surface topography; Cu; Fe; Fe films; Fe on stepped Cu(111); Kurdjumov-Sachs orientation; fcc(111) to bcc(110); in-plane high-moment phase; low energy electron diffraction; magnetism; magneto-optical Kerr effect; morphology; perpendicular easy magnetization axis; quasi one-dimensional stripes; scanning tunnelling microscopy; strong decoration effect; structural transition; structure; two-dimensional films; Diffraction; Iron; Kerr effect; Magnetic films; Magnetic force microscopy; Magnetization; Magnetooptic effects; Morphology; Scanning electron microscopy; Tunneling;
Journal_Title :
Magnetics, IEEE Transactions on
