TY - JOUR
T1 - Effect of film morphology on the magnetic properties for NdFeB thin films
AU - Sato, T.
AU - Kato, H.
AU - Shima, T.
AU - Takahashi, Y. K.
AU - Hono, K.
N1 - Funding Information:
This work was supported partly by Toyota Motor Corporation. Magnetization measurement and structural characterization were performed at the Hi-tech Research Center of Tohoku Gakuin University.
PY - 2011/1
Y1 - 2011/1
N2 - The microstructure and magnetic properties of NdFeB thin films with a particulate structure were investigated. The nominal thickness of the NdFeB layer (tN) was varied from 2 to 50 nm on a (0 0 1) Mo buffer layer. The films were grown with their c-axis perpendicular to the plane, and the morphology of the film with tN=2 nm was shown to be particulate from an atomic force microscope image. The slope of the initial magnetization curve became steeper by increasing the tN value in the initial magnetization curve, indicating that the film morphology composed of single domain particles changed to that of multi-domain particles with growth. The film with tN=8 nm, which had a structure consisting of a mixture of single and multiple domain particles, showed the maximum value of the coercivity measured in the direction perpendicular to the film plane (Hc) as 19.5 kOe.
AB - The microstructure and magnetic properties of NdFeB thin films with a particulate structure were investigated. The nominal thickness of the NdFeB layer (tN) was varied from 2 to 50 nm on a (0 0 1) Mo buffer layer. The films were grown with their c-axis perpendicular to the plane, and the morphology of the film with tN=2 nm was shown to be particulate from an atomic force microscope image. The slope of the initial magnetization curve became steeper by increasing the tN value in the initial magnetization curve, indicating that the film morphology composed of single domain particles changed to that of multi-domain particles with growth. The film with tN=8 nm, which had a structure consisting of a mixture of single and multiple domain particles, showed the maximum value of the coercivity measured in the direction perpendicular to the film plane (Hc) as 19.5 kOe.
KW - High coercivity material
KW - Morphology
KW - Nano-structure
KW - NdFeB thin film
KW - Perpendicular anisotropy
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U2 - 10.1016/j.jmmm.2010.08.056
DO - 10.1016/j.jmmm.2010.08.056
M3 - Article
AN - SCOPUS:77958020306
SN - 0304-8853
VL - 323
SP - 162
EP - 165
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
IS - 1
ER -