Finitehyphen;size effects in the magnetic hysteresis behavior of Ndhyphen;Fe films

摘要

The magnetic hysteresis properties of Ndhyphen;Fe films have been examined in films with different composition and thickness. All the films show a similar behavior; the coercivity is rather small at room temperature but it increases rapidly upon cooling to cryogenic temperatures. At these temperatures the coercivity is found to increase initially with the film thickness and then saturate at higher thickness. The maximum value of coercivity is much lower than that of melthyphen;spun ribbons with similar composition. The coercivity has been attributed to domain wall pinning by small regions having a shorthyphen;range order embedded in a Ndhyphen;Fe amorphous matrix.