Study of growth and broadband FMR spectroscopy in PLD grown Y3Fe5O12/Gd3Ga5O12 thin films

S. Satapathy; R. P. Pant; K. K. Maurya

doi:10.1088/1361-6463/ac89fb

Study of growth and broadband FMR spectroscopy in PLD grown Y₃Fe₅O₁₂/Gd₃Ga₅O₁₂ thin films

S. Satapathy, R. P. Pant, K. K. Maurya

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

2 Citations (Scopus)

Abstract

We report the structural and magnetization dynamics of pulsed laser ablated Y₃Fe₅O₁₂ (YIG) thin films grown on gadolinium gallium garnet (GGG[110]) substrate. The co-planar waveguide ferromagnetic resonance measurement was performed to study the thickness and inhomogeneity effect on damping constant. We also estimated the effective demagnetization ( 4 π M eff ) value which was lower than that of single-crystalline bulk YIG. A detailed line width analysis revealed the significant two-magnon scattering and inhomogeneity contribution to damping which varied for different thickness films. The Gilbert damping constant (α) of the grown film was found to be lowest in the case of 100 nm film (≈3 × 10⁻⁴), and the corresponding inhomogeneous broadening (ΔH _O) was recorded to be 77 Oe. Further angular measurements on 100 nm thin film revealed the presence of strong uniaxial magnetic anisotropy field of 735 Oe at 10 GHz RF frequency.

Original language	English
Article number	435004
Journal	Journal Physics D: Applied Physics
Volume	55
Issue number	43
DOIs	https://doi.org/10.1088/1361-6463/ac89fb
Publication status	Published - 27 Oct 2022
Externally published	Yes

Keywords

broad band ferromagnetic resonance (FMR)
damping constant (α)
inhomogeneous broadening
line width
resonance field
uniaxial magnetic anisotropy constant (UMA)

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Acoustics and Ultrasonics
Surfaces, Coatings and Films

Access to Document

10.1088/1361-6463/ac89fb

Cite this

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title = "Study of growth and broadband FMR spectroscopy in PLD grown Y3Fe5O12/Gd3Ga5O12 thin films",

abstract = "We report the structural and magnetization dynamics of pulsed laser ablated Y3Fe5O12 (YIG) thin films grown on gadolinium gallium garnet (GGG[110]) substrate. The co-planar waveguide ferromagnetic resonance measurement was performed to study the thickness and inhomogeneity effect on damping constant. We also estimated the effective demagnetization ( 4 π M eff ) value which was lower than that of single-crystalline bulk YIG. A detailed line width analysis revealed the significant two-magnon scattering and inhomogeneity contribution to damping which varied for different thickness films. The Gilbert damping constant (α) of the grown film was found to be lowest in the case of 100 nm film (≈3 × 10−4), and the corresponding inhomogeneous broadening (ΔH O) was recorded to be 77 Oe. Further angular measurements on 100 nm thin film revealed the presence of strong uniaxial magnetic anisotropy field of 735 Oe at 10 GHz RF frequency.",

keywords = "broad band ferromagnetic resonance (FMR), damping constant (α), inhomogeneous broadening, line width, resonance field, uniaxial magnetic anisotropy constant (UMA)",

author = "S. Satapathy and Pant, {R. P.} and Maurya, {K. K.}",

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AU - Satapathy, S.

AU - Pant, R. P.

AU - Maurya, K. K.

PY - 2022/10/27

Y1 - 2022/10/27

N2 - We report the structural and magnetization dynamics of pulsed laser ablated Y3Fe5O12 (YIG) thin films grown on gadolinium gallium garnet (GGG[110]) substrate. The co-planar waveguide ferromagnetic resonance measurement was performed to study the thickness and inhomogeneity effect on damping constant. We also estimated the effective demagnetization ( 4 π M eff ) value which was lower than that of single-crystalline bulk YIG. A detailed line width analysis revealed the significant two-magnon scattering and inhomogeneity contribution to damping which varied for different thickness films. The Gilbert damping constant (α) of the grown film was found to be lowest in the case of 100 nm film (≈3 × 10−4), and the corresponding inhomogeneous broadening (ΔH O) was recorded to be 77 Oe. Further angular measurements on 100 nm thin film revealed the presence of strong uniaxial magnetic anisotropy field of 735 Oe at 10 GHz RF frequency.

AB - We report the structural and magnetization dynamics of pulsed laser ablated Y3Fe5O12 (YIG) thin films grown on gadolinium gallium garnet (GGG[110]) substrate. The co-planar waveguide ferromagnetic resonance measurement was performed to study the thickness and inhomogeneity effect on damping constant. We also estimated the effective demagnetization ( 4 π M eff ) value which was lower than that of single-crystalline bulk YIG. A detailed line width analysis revealed the significant two-magnon scattering and inhomogeneity contribution to damping which varied for different thickness films. The Gilbert damping constant (α) of the grown film was found to be lowest in the case of 100 nm film (≈3 × 10−4), and the corresponding inhomogeneous broadening (ΔH O) was recorded to be 77 Oe. Further angular measurements on 100 nm thin film revealed the presence of strong uniaxial magnetic anisotropy field of 735 Oe at 10 GHz RF frequency.

KW - broad band ferromagnetic resonance (FMR)

KW - damping constant (α)

KW - inhomogeneous broadening

KW - line width

KW - resonance field

KW - uniaxial magnetic anisotropy constant (UMA)

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