TY - JOUR
T1 - Enhanced low-temperature interfacial gilbert damping in pt/yig/pt trilayer structures
AU - Pati, Satya Prakash
AU - Endo, Yasushi
N1 - Funding Information:
ACKNOWLEDGMENT This work was supported by JSPS KAKENHI through MEXT, Japan and ASRC, Japan under Grant JP17H03226 and Grant JP17F17070. S. P. Pati would like to thank JSPS for the international Post-Doctoral Research Fellowship (ID No: P17070). The authors would like to thank Quantum Design for PPMS ferromagnetic resonance measurement.
Publisher Copyright:
© 1965-2012 IEEE.
PY - 2019/2
Y1 - 2019/2
N2 - The temperature-dependent magnetization dynamics in Pt/YIG/Pt trilayer structure is investigated by broadband ferromagnetic resonance (FMR) measurement method. The resonance field shifts toward a lower magnetic field with the decrease in temperature, and subsequently, a substantial increase in the FMR linewidth is obtained. This results in the enhancement of effective Gilbert damping ( $\alpha -{eff}$ ). The value of $\alpha -{eff}$ is enhanced from $1.1 \times 10^{-3}$ at 300 K to $5.0 \times 10^{-3}$ at 10 K. The origin of this enhancement in $\alpha -{eff}$ value may be interfacial in nature as it is prominent for the lower thickness of yttrium-iron-garnet layer at low temperature. Magnetic anisotropic dispersion at the interface may lead to the increase in inhomogeneous broadening with decreasing temperature.
AB - The temperature-dependent magnetization dynamics in Pt/YIG/Pt trilayer structure is investigated by broadband ferromagnetic resonance (FMR) measurement method. The resonance field shifts toward a lower magnetic field with the decrease in temperature, and subsequently, a substantial increase in the FMR linewidth is obtained. This results in the enhancement of effective Gilbert damping ( $\alpha -{eff}$ ). The value of $\alpha -{eff}$ is enhanced from $1.1 \times 10^{-3}$ at 300 K to $5.0 \times 10^{-3}$ at 10 K. The origin of this enhancement in $\alpha -{eff}$ value may be interfacial in nature as it is prominent for the lower thickness of yttrium-iron-garnet layer at low temperature. Magnetic anisotropic dispersion at the interface may lead to the increase in inhomogeneous broadening with decreasing temperature.
KW - Ferromagnetic resonance (fmr)
KW - Gilbert damping
KW - Magnetization dynamics
KW - Yttrium-iron-garnet (yig)
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U2 - 10.1109/TMAG.2018.2863678
DO - 10.1109/TMAG.2018.2863678
M3 - Article
AN - SCOPUS:85052707479
VL - 55
JO - IEEE Transactions on Magnetics
JF - IEEE Transactions on Magnetics
SN - 0018-9464
IS - 2
M1 - 8444695
ER -