Title :
Appearance of ferromagnetism at room temperature in Mn-Si films prepared by alternate deposition
Author :
Takeuchi, T. ; Hirayama, Y. ; Futamoto, M.
Author_Institution :
Hitachi Ltd., Tokyo, Japan
fDate :
11/1/1993 12:00:00 AM
Abstract :
Ferromagnetic Mn-Si films with Curie temperature of 120°C are obtained, although no Mn-Si compound ferromagnetic at room temperature is reported. Ferromagnetism at room temperature appears when the films are prepared by alternate deposition at a substrate temperature around 360°C. The saturation magnetization is enhanced when polyimide is used as the substrate or placed on other substrate surfaces. The ferromagnetic regions are localized near the interfaces between Mn and Si layers, judging from cross-sectional transmission electron micrographs and the stacking period dependence of the saturation magnetization
Keywords :
Auger effect; Curie temperature; ferromagnetic properties of substances; ferromagnetic resonance; magnetic thin films; magnetisation; manganese; manganese alloys; secondary ion mass spectra; silicon; silicon alloys; transmission electron microscope examination of materials; vacuum deposited coatings; vacuum deposition; 120 degC; Curie temperature; Mn-Si; alternate deposition; cross-sectional transmission electron micrographs; ferromagnetic Mn-Si films; ferromagnetic regions; interfaces; polyimide; saturation magnetization; stacking period dependence; substrate surfaces; substrate temperature; Electrons; Glass; Magnetic films; Magnetic multilayers; Magnetic properties; Magnetic resonance; Polyimides; Saturation magnetization; Substrates; Temperature;
Journal_Title :
Magnetics, IEEE Transactions on
