Abstract
Damping factor of a Permalloy (Py) thin film is estimated by using the magnetostatic spin wave propagation. The attenuation lengths are obtained by the dependence of the transmission intensity on the antenna distance, and decrease with increasing magnetic fields. The relationship between the attenuation length, damping factor, and external magnetic field is derived theoretically, and the damping factor was determined to be 0.0063 by fitting the magnetic field dependence of the attenuation length, using the derived equation. The obtained value is in good agreement with the general value of Py. Thus, this estimation method of the damping factor using spin waves attenuation can be useful tool for ferromagnetic thin films.
| Original language | English |
|---|---|
| Article number | 17D121 |
| Journal | Journal of Applied Physics |
| Volume | 117 |
| Issue number | 17 |
| DOIs | |
| Publication status | Published - 2015 May 7 |
| Externally published | Yes |
Fingerprint
ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
Damping factor estimation using spin wave attenuation in permalloy film. / Manago, Takashi; Yamanoi, Kazuto; Kasai, Shinya; Mitani, Seiji.
In: Journal of Applied Physics, Vol. 117, No. 17, 17D121, 07.05.2015.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Damping factor estimation using spin wave attenuation in permalloy film
AU - Manago, Takashi
AU - Yamanoi, Kazuto
AU - Kasai, Shinya
AU - Mitani, Seiji
PY - 2015/5/7
Y1 - 2015/5/7
N2 - Damping factor of a Permalloy (Py) thin film is estimated by using the magnetostatic spin wave propagation. The attenuation lengths are obtained by the dependence of the transmission intensity on the antenna distance, and decrease with increasing magnetic fields. The relationship between the attenuation length, damping factor, and external magnetic field is derived theoretically, and the damping factor was determined to be 0.0063 by fitting the magnetic field dependence of the attenuation length, using the derived equation. The obtained value is in good agreement with the general value of Py. Thus, this estimation method of the damping factor using spin waves attenuation can be useful tool for ferromagnetic thin films.
AB - Damping factor of a Permalloy (Py) thin film is estimated by using the magnetostatic spin wave propagation. The attenuation lengths are obtained by the dependence of the transmission intensity on the antenna distance, and decrease with increasing magnetic fields. The relationship between the attenuation length, damping factor, and external magnetic field is derived theoretically, and the damping factor was determined to be 0.0063 by fitting the magnetic field dependence of the attenuation length, using the derived equation. The obtained value is in good agreement with the general value of Py. Thus, this estimation method of the damping factor using spin waves attenuation can be useful tool for ferromagnetic thin films.
UR - http://www.scopus.com/inward/record.url?scp=84924767364&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84924767364&partnerID=8YFLogxK
U2 - 10.1063/1.4914538
DO - 10.1063/1.4914538
M3 - Article
AN - SCOPUS:84924767364
VL - 117
JO - Journal of Applied Physics
JF - Journal of Applied Physics
SN - 0021-8979
IS - 17
M1 - 17D121
ER -