Title :
Thin Nd-Fe-B films analyzed by Lorentz and magnetic force microscopy
Author :
Lemke, H. ; Göddenhenrich, T. ; Heiden, C. ; Thomas, G.
fDate :
9/1/1997 12:00:00 AM
Abstract :
The influence of nano sized crystal structure on the domain structure of Nd-Fe-B films has been analyzed by means of transmission electron and scanning force microscopy. For magnetic imaging these instruments have been operated in the Lorentz/MFM mode. The samples have been prepared by pulsed laser deposition on carbon films with the substrates at about 625°C. The multiphase composition of the films consists of the hard magnetic Nd2Fe14B phases as major phases and of soft magnetic phases such as Fe2B and α-Fe as well as Nd2O3. The crystalline structure produces circular magnetic domains with diameters on the order of 100 nm which are influenced by the grain structure. Most domains cover several grains. The use of Nd-Fe-B films for data storage is suggested
Keywords :
boron alloys; crystal microstructure; ferromagnetic materials; iron alloys; magnetic domains; magnetic force microscopy; magnetic thin films; nanostructured materials; neodymium alloys; permanent magnets; pulsed laser deposition; transmission electron microscopy; 625 C; C; C film substrate; Lorentz microscopy; Lorentz/MFM mode; Nd-Fe-B; circular magnetic domains; crystalline structure; data storage; domain structure; grain structure; hard magnetic Nd2Fe14B phases; magnetic force microscopy; magnetic imaging; multiphase composition; nano sized crystal structure; pulsed laser deposition; scanning force microscopy; soft magnetic phases; thin Nd-Fe-B films; transmission electron microscopy; Electrons; Iron; Magnetic analysis; Magnetic domains; Magnetic films; Magnetic force microscopy; Magnetic forces; Neodymium; Pulsed laser deposition; Soft magnetic materials;
Journal_Title :
Magnetics, IEEE Transactions on
