Effect of heat treatment on microstructure and magnetic properties of anisotropic Nd-Fe-B films with Mo or Ti buffer layer
Journal Article
·
· Journal of Applied Physics
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, and International Centre for Materials Physics, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, 110016 (China)
High coercivity Nd-Fe-B films with c-axis texture perpendicular to the film plane have been prepared by dc magnetron sputtering and subsequent heat treatment. The influences of heat treatment and buffer layer materials (Mo and Ti) on the microstructure and magnetic properties of the Nd-Fe-B films are investigated. For the film with Mo buffer layer, when the substrate temperatures (T{sub s}) are below the crystallization temperature (T{sub cr}), the as-deposited films are identified to be soft magnetic with a mazelike stripe magnetic domain structure. After subsequent heat treatment, Nd{sub 2}Fe{sub 14}B phase forms with c-axis texture perpendicular to the film plane, and the domain structure is not mazelike anymore. The coercivity of the annealed films increases with decreasing T{sub s} and the highest coercivity of about 22.8 kOe has been achieved. For the film with Ti buffer layer, the heat treatment also results in changing the magnetic domain structures from a mazelike pattern to a disordered pattern. Atomic force microscopic observation shows that some ridgelike areas exist in the annealed film with Ti buffer layer.
- OSTI ID:
- 20714153
- Journal Information:
- Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 11 Vol. 98; ISSN JAPIAU; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
ANISOTROPY
ANNEALING
ATOMIC FORCE MICROSCOPY
BORON ALLOYS
COERCIVE FORCE
CRYSTAL STRUCTURE
CRYSTALLIZATION
DEPOSITION
DOMAIN STRUCTURE
IRON ALLOYS
MAGNETIC PROPERTIES
MICROSTRUCTURE
MOLYBDENUM
NEODYMIUM ALLOYS
SPUTTERING
SUBSTRATES
TERNARY ALLOY SYSTEMS
TEXTURE
THIN FILMS
TITANIUM
ANISOTROPY
ANNEALING
ATOMIC FORCE MICROSCOPY
BORON ALLOYS
COERCIVE FORCE
CRYSTAL STRUCTURE
CRYSTALLIZATION
DEPOSITION
DOMAIN STRUCTURE
IRON ALLOYS
MAGNETIC PROPERTIES
MICROSTRUCTURE
MOLYBDENUM
NEODYMIUM ALLOYS
SPUTTERING
SUBSTRATES
TERNARY ALLOY SYSTEMS
TEXTURE
THIN FILMS
TITANIUM