Title :
High coercive field and film stress for epitaxial monolayers of Fe on W(110)
Author :
Sander, D. ; Enders, A. ; Skomski, R. ; Kirschner, J.
Author_Institution :
Max-Planck-Inst. fur Mikrostrukturphys., Halle, Germany
fDate :
9/1/1996 12:00:00 AM
Abstract :
Elastic and magnetic properties of ultrathin iron films on tungsten (110) are investigated. In situ film stress measurements during growth show stress values of 25 GPa per deposited monolayer. Our experiments indicate that the tremendous film stress triggers the formation of a misfit dislocation network at a coverage of 1.5 monolayers. The effect of the film stress and its spatial variation on the magnetic behavior are discussed. We find a high coercivity of order 0.3 T for 1.5 monolayer thick films. A model is presented that explains the high coercivity in terms of strong domain wall pinning
Keywords :
coercive force; dislocations; ferromagnetic materials; internal stresses; iron; magnetic domain walls; magnetic epitaxial layers; magnetomechanical effects; monolayers; 0.3 T; 25 GPa; Fe; Fe epitaxial monolayers; W; W(110); coercivity; domain wall pinning; elastic properties; film stress; film stress measurements; high coercive field; magnetic properties; misfit dislocation network; model; monolayer; ultrathin iron films; Coercive force; Iron; Magnetic domain walls; Magnetic domains; Magnetic films; Magnetic properties; Morphology; Stress measurement; Tensile stress; Tungsten;
Journal_Title :
Magnetics, IEEE Transactions on
