Specific Heat Capacity: Thickness Critical Spontaneous Magnetization in Striped Ferromagnetic Thin Films

摘要

Magnetic properties of thin ferromagnetic films are drastically altered by the presence of magnetic and nonmagnetic interfaces. This paper explores thickness dependent spontaneous magnetization in magnetically striped thin films. Below a certain thickness of the film, the spontaneous magnetization process does not occur. The saturation in net magnetization is achieved without showing any critical behavior. The magnetization monotonically increases with decrease in temperature. Specific heat capacity vs temperature for different thickness of the films, are plotted. Specific heat capacity indicates that spin fluctuations in ultra thin films are large. That may result into the absence of spontaneous magnetization because of dimensionality effect.