Title :
Electron microscopy of thin films prepared by laser ablation
Author :
Lemke, H. ; Echer, C. ; Thomas, G.
Author_Institution :
Dept. of Mater. Sci. & Miner. Eng., California Univ., Berkeley, CA, USA
fDate :
9/1/1996 12:00:00 AM
Abstract :
A simple processing method has been developed for studying model Nd-Fe-B magnets. The grain structure of these samples is comparable to that of melt-spun magnets. The samples are prepared by depositing films on a carbon foil TEM grid by laser ablation. The influence of temperature on the grain structure is emphasized. Deposition at room temperature yields amorphous films. Crystallinity is obtained at substrate temperatures above 600°C during deposition. The size of the grains is about 20 nm
Keywords :
amorphous magnetic materials; boron alloys; ferromagnetic materials; grain size; iron alloys; laser deposition; magnetic particles; neodymium alloys; permanent magnets; transmission electron microscopy; 20 nm; 600 C; Nd-Fe-B; amorphous thin films; carbon foil TEM grid; crystallinity; grain size; grain structure; laser ablation; melt-spun magnets; substrate temperature; Amorphous materials; Crystallization; Electron microscopy; Laser ablation; Laser modes; Magnetic films; Magnets; Substrates; Temperature distribution; Transistors;
Journal_Title :
Magnetics, IEEE Transactions on
