TY - JOUR
T1 - Phenomenological analysis of magnetization reversal process for L 10 -FePt (001) particulate films
AU - Wang, Dongling
AU - Seki, Takeshi
AU - Takanashi, Koki
AU - Shima, Toshiyuki
AU - Li, Gouqing
AU - Saito, Hitoshi
AU - Ishio, Shunji
N1 - Funding Information:
This work was partially supported by the Global COE Program “Materials Integration,” Tohoku University, and a Grant-in-Aid for Scientific Research in Priority Area “Creation and control of spin current” from MEXT, Japan.
PY - 2009
Y1 - 2009
N2 - The magnetization reversal processes for L 10 -FePt (001) particulate films before and after Ar ion irradiation were experimentally investigated, and the size of the defect region (2 r0) and the effective demagnetization factor (Neff) were evaluated based on a phenomenological analysis. A large coercivity (Hc) of 30.4 kOe, which originates from the particulate structure, drastically reduced after ion irradiation. The phenomenological analysis showed the increase of 2 r0 by irradiating Ar ions, which clearly indicates that Hc is closely related with the size of 2 r0. In addition, the FePt particulate films show large Neff, which may arise from the large dipole interaction between particles and the distribution of particle sizes and shapes.
AB - The magnetization reversal processes for L 10 -FePt (001) particulate films before and after Ar ion irradiation were experimentally investigated, and the size of the defect region (2 r0) and the effective demagnetization factor (Neff) were evaluated based on a phenomenological analysis. A large coercivity (Hc) of 30.4 kOe, which originates from the particulate structure, drastically reduced after ion irradiation. The phenomenological analysis showed the increase of 2 r0 by irradiating Ar ions, which clearly indicates that Hc is closely related with the size of 2 r0. In addition, the FePt particulate films show large Neff, which may arise from the large dipole interaction between particles and the distribution of particle sizes and shapes.
UR - http://www.scopus.com/inward/record.url?scp=65249131656&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=65249131656&partnerID=8YFLogxK
U2 - 10.1063/1.3058615
DO - 10.1063/1.3058615
M3 - Article
AN - SCOPUS:65249131656
SN - 0021-8979
VL - 105
JO - Journal of Applied Physics
JF - Journal of Applied Physics
IS - 7
M1 - 07A702
ER -