Nanometer-Thick Yttrium Iron Garnet Films with Extremely Low Damping

Houchen Chang; Peng Li; Wei Zhang; Tao Liu; Axel Hoffmann; Longjiang Deng; Mingzhong Wu

doi:10.1109/LMAG.2014.2350958

Nanometer-Thick Yttrium Iron Garnet Films with Extremely Low Damping

Houchen Chang, Peng Li, Wei Zhang, Tao Liu, Axel Hoffmann, Longjiang Deng, Mingzhong Wu

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

Abstract

Yttrium iron garnet (YIG) films that are in the nanometer thickness range and show extremely low damping are reported. The films were deposited via sputtering at room temperature and were then annealed in O₂ at high temperature. A 22-nm-Thick YIG film showed a Gilbert damping constant α = (8.58±0.21)× 10^-5, which represents the lowest damping ever reported for nanometer-Thick magnetic films. The film had a gyromagnetic ratio of γ= 2.83 MHz/Oe and a saturation induction of 4φ Ms = 1766 G, which are both very close to those of single-crystal YIG bulk materials. The film had a very smooth surface, with an rms surface roughness of about 0.13 nm.

Original language	English (US)
Article number	6882836
Journal	IEEE Magnetics Letters
Volume	5
DOIs	https://doi.org/10.1109/LMAG.2014.2350958
State	Published - 2014
Externally published	Yes

Keywords

Damping
Films
Fitting
Magnetic fields
Magnetic resonance
Sputtering

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials

Online availability

10.1109/LMAG.2014.2350958

Library availability

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title = "Nanometer-Thick Yttrium Iron Garnet Films with Extremely Low Damping",

abstract = "Yttrium iron garnet (YIG) films that are in the nanometer thickness range and show extremely low damping are reported. The films were deposited via sputtering at room temperature and were then annealed in O2 at high temperature. A 22-nm-Thick YIG film showed a Gilbert damping constant α = (8.58±0.21)× 10-5, which represents the lowest damping ever reported for nanometer-Thick magnetic films. The film had a gyromagnetic ratio of γ= 2.83 MHz/Oe and a saturation induction of 4φ Ms = 1766 G, which are both very close to those of single-crystal YIG bulk materials. The film had a very smooth surface, with an rms surface roughness of about 0.13 nm.",

keywords = "Damping, Films, Fitting, Magnetic fields, Magnetic resonance, Sputtering",

author = "Houchen Chang and Peng Li and Wei Zhang and Tao Liu and Axel Hoffmann and Longjiang Deng and Mingzhong Wu",

note = "Publisher Copyright: {\textcopyright} 2010-2012 IEEE.",

year = "2014",

doi = "10.1109/LMAG.2014.2350958",

language = "English (US)",

volume = "5",

journal = "IEEE Magnetics Letters",

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publisher = "Institute of Electrical and Electronics Engineers Inc.",

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T1 - Nanometer-Thick Yttrium Iron Garnet Films with Extremely Low Damping

AU - Chang, Houchen

AU - Li, Peng

AU - Zhang, Wei

AU - Liu, Tao

AU - Hoffmann, Axel

AU - Deng, Longjiang

AU - Wu, Mingzhong

PY - 2014

Y1 - 2014

N2 - Yttrium iron garnet (YIG) films that are in the nanometer thickness range and show extremely low damping are reported. The films were deposited via sputtering at room temperature and were then annealed in O2 at high temperature. A 22-nm-Thick YIG film showed a Gilbert damping constant α = (8.58±0.21)× 10-5, which represents the lowest damping ever reported for nanometer-Thick magnetic films. The film had a gyromagnetic ratio of γ= 2.83 MHz/Oe and a saturation induction of 4φ Ms = 1766 G, which are both very close to those of single-crystal YIG bulk materials. The film had a very smooth surface, with an rms surface roughness of about 0.13 nm.

AB - Yttrium iron garnet (YIG) films that are in the nanometer thickness range and show extremely low damping are reported. The films were deposited via sputtering at room temperature and were then annealed in O2 at high temperature. A 22-nm-Thick YIG film showed a Gilbert damping constant α = (8.58±0.21)× 10-5, which represents the lowest damping ever reported for nanometer-Thick magnetic films. The film had a gyromagnetic ratio of γ= 2.83 MHz/Oe and a saturation induction of 4φ Ms = 1766 G, which are both very close to those of single-crystal YIG bulk materials. The film had a very smooth surface, with an rms surface roughness of about 0.13 nm.

KW - Damping

KW - Films

KW - Fitting

KW - Magnetic fields

KW - Magnetic resonance

KW - Sputtering

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Nanometer-Thick Yttrium Iron Garnet Films with Extremely Low Damping

Abstract

Keywords

ASJC Scopus subject areas

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