Thin Nd-Fe-B films analyzed by Lorentz and magnetic force microscopy

Author

Lemke, H. ; Göddenhenrich, T. ; Heiden, C. ; Thomas, G.

Volume

33

Issue

5

fYear

1997

fDate

9/1/1997 12:00:00 AM

Firstpage

3865

Lastpage

3867

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;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.619597

Filename

619597