TY - JOUR
T1 - Time-resolved kerr effect in very thin films of CoCrPt alloys
AU - Mizukami, S.
AU - Watanabe, D.
AU - Kubota, T.
AU - Zhang, X.
AU - Naganuma, H.
AU - Oogane, M.
AU - Ando, Y.
AU - Miyazaki, T.
N1 - Funding Information:
ACKNOWLEDGMENT This work was supported in part by a Grant for Industrial Technology Research from NEDO, a Grant-in-Aid for Scientific Research from JSPS, and the Asahi Glass Foundation.
PY - 2011/10
Y1 - 2011/10
N2 - Fast precessional dynamics of magnetization are reported in very thin films of CoCrPt alloy with large perpendicular magnetic anisotropy. The films are fabricated with different substrate temperatures, and magnetization dynamics are investigated using time-resolved magneto-optical Kerr effect. The Kittel's equation well describes a dependency of magnetization precession frequency on an applied magnetic field direction for all the films, only when the field is relatively large. An inverse lifetime of magnetization precession, a counterpart of a line width in ferromagnetic resonance (FMR), depends strongly on the field direction even at the applied field of around 10 kOe. The Gilbert damping constant α is estimated to be ∼ 0.05 for all the films using a model taking account of an influence of perpendicular magnetic anisotropy dispersion.
AB - Fast precessional dynamics of magnetization are reported in very thin films of CoCrPt alloy with large perpendicular magnetic anisotropy. The films are fabricated with different substrate temperatures, and magnetization dynamics are investigated using time-resolved magneto-optical Kerr effect. The Kittel's equation well describes a dependency of magnetization precession frequency on an applied magnetic field direction for all the films, only when the field is relatively large. An inverse lifetime of magnetization precession, a counterpart of a line width in ferromagnetic resonance (FMR), depends strongly on the field direction even at the applied field of around 10 kOe. The Gilbert damping constant α is estimated to be ∼ 0.05 for all the films using a model taking account of an influence of perpendicular magnetic anisotropy dispersion.
KW - Magnetic films
KW - magnetic resonance
KW - magneto-optic Kerr effects
KW - perpendicular magnetic anisotropy (PMA)
UR - http://www.scopus.com/inward/record.url?scp=80053555065&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=80053555065&partnerID=8YFLogxK
U2 - 10.1109/TMAG.2011.2154357
DO - 10.1109/TMAG.2011.2154357
M3 - Article
AN - SCOPUS:80053555065
SN - 0018-9464
VL - 47
SP - 3897
EP - 3900
JO - IEEE Transactions on Magnetics
JF - IEEE Transactions on Magnetics
IS - 10
M1 - 6028090
ER -