Effect of a Platinum Buffer Layer on the Magnetization Dynamics of Sputter Deposited YIG Polycrystalline Thin Films

Satya Prakash Pati; Muftah Al-Mahdawi; Yohei Shiokawa; Masashi Sahashi; Yasushi Endo

doi:10.1109/TMAG.2017.2695560

Effect of a Platinum Buffer Layer on the Magnetization Dynamics of Sputter Deposited YIG Polycrystalline Thin Films

Satya Prakash Pati, Muftah Al-Mahdawi, Yohei Shiokawa, Masashi Sahashi, Yasushi Endo

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

The present investigation deals with the effect of thickness and a platinum (Pt) buffer layer on the dynamic magnetic properties of polycrystalline yttrium iron garnet (YIG) films fabricated after post-annealing to recrystallize from the amorphous state. The dynamic magnetic properties of films without a buffer layer deteriorate as the thickness decreases as indicated by the increased line-widths in the ferromagnetic resonance spectra. On the other hand, a strong rejuvenation in the static and dynamic magnetic properties of the films is observed when a Pt buffer layer is used. The Pt buffer layer decreases the Gilbert damping parameter from 11.4 x10^-4 and 3.5x10^-4 for a 100 nm-thick YIG film. These observations mainly originate from controlling the microstructure or the surface morphology of the films.

Original language	English
Article number	7906600
Journal	IEEE Transactions on Magnetics
Volume	53
Issue number	11
DOIs	https://doi.org/10.1109/TMAG.2017.2695560
Publication status	Published - 2017 Nov

Keywords

Coplanar waveguide ferromagnetic resonance (CPW-FMR) measurement
damping constant
thin film
yttrium iron garnet (YIG)

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10.1109/TMAG.2017.2695560

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title = "Effect of a Platinum Buffer Layer on the Magnetization Dynamics of Sputter Deposited YIG Polycrystalline Thin Films",

abstract = "The present investigation deals with the effect of thickness and a platinum (Pt) buffer layer on the dynamic magnetic properties of polycrystalline yttrium iron garnet (YIG) films fabricated after post-annealing to recrystallize from the amorphous state. The dynamic magnetic properties of films without a buffer layer deteriorate as the thickness decreases as indicated by the increased line-widths in the ferromagnetic resonance spectra. On the other hand, a strong rejuvenation in the static and dynamic magnetic properties of the films is observed when a Pt buffer layer is used. The Pt buffer layer decreases the Gilbert damping parameter from 11.4 x10-4 and 3.5x10-4 for a 100 nm-thick YIG film. These observations mainly originate from controlling the microstructure or the surface morphology of the films.",

keywords = "Coplanar waveguide ferromagnetic resonance (CPW-FMR) measurement, damping constant, thin film, yttrium iron garnet (YIG)",

author = "Pati, {Satya Prakash} and Muftah Al-Mahdawi and Yohei Shiokawa and Masashi Sahashi and Yasushi Endo",

note = "Funding Information: ACKNOWLEDGMENT This work was supported in part by the SCOPE Program from the Ministry of Internal Affairs and Communications, Japan, under Contract 0159-0058, in part by JSPS KAKENHI from the Ministry of Education, Culture, Sports, Science and Technology, Japan, under Grant JP17F17070, and in part by the Murata Science Foundation and ASRC, Japan. The work of S. P. Pati was supported by JSPS for the international post-doctoral research fellowship under Grant P17070. Publisher Copyright: {\textcopyright} 1965-2012 IEEE.",

year = "2017",

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doi = "10.1109/TMAG.2017.2695560",

language = "English",

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journal = "IEEE Transactions on Magnetics",

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AU - Pati, Satya Prakash

AU - Al-Mahdawi, Muftah

AU - Shiokawa, Yohei

AU - Sahashi, Masashi

AU - Endo, Yasushi

N1 - Funding Information: ACKNOWLEDGMENT This work was supported in part by the SCOPE Program from the Ministry of Internal Affairs and Communications, Japan, under Contract 0159-0058, in part by JSPS KAKENHI from the Ministry of Education, Culture, Sports, Science and Technology, Japan, under Grant JP17F17070, and in part by the Murata Science Foundation and ASRC, Japan. The work of S. P. Pati was supported by JSPS for the international post-doctoral research fellowship under Grant P17070. Publisher Copyright: © 1965-2012 IEEE.

PY - 2017/11

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N2 - The present investigation deals with the effect of thickness and a platinum (Pt) buffer layer on the dynamic magnetic properties of polycrystalline yttrium iron garnet (YIG) films fabricated after post-annealing to recrystallize from the amorphous state. The dynamic magnetic properties of films without a buffer layer deteriorate as the thickness decreases as indicated by the increased line-widths in the ferromagnetic resonance spectra. On the other hand, a strong rejuvenation in the static and dynamic magnetic properties of the films is observed when a Pt buffer layer is used. The Pt buffer layer decreases the Gilbert damping parameter from 11.4 x10-4 and 3.5x10-4 for a 100 nm-thick YIG film. These observations mainly originate from controlling the microstructure or the surface morphology of the films.

AB - The present investigation deals with the effect of thickness and a platinum (Pt) buffer layer on the dynamic magnetic properties of polycrystalline yttrium iron garnet (YIG) films fabricated after post-annealing to recrystallize from the amorphous state. The dynamic magnetic properties of films without a buffer layer deteriorate as the thickness decreases as indicated by the increased line-widths in the ferromagnetic resonance spectra. On the other hand, a strong rejuvenation in the static and dynamic magnetic properties of the films is observed when a Pt buffer layer is used. The Pt buffer layer decreases the Gilbert damping parameter from 11.4 x10-4 and 3.5x10-4 for a 100 nm-thick YIG film. These observations mainly originate from controlling the microstructure or the surface morphology of the films.

KW - Coplanar waveguide ferromagnetic resonance (CPW-FMR) measurement

KW - damping constant

KW - thin film

KW - yttrium iron garnet (YIG)

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Effect of a Platinum Buffer Layer on the Magnetization Dynamics of Sputter Deposited YIG Polycrystalline Thin Films

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