Theoretical Study of Gilbert Damping Constants in Magnetic Multilayer Films

Dai Ozaki; Daisuke Miura; Akimasa Sakuma

doi:10.1109/TMAG.2019.2893370

Theoretical Study of Gilbert Damping Constants in Magnetic Multilayer Films

Dai Ozaki, Daisuke Miura, Akimasa Sakuma

ENG - Applied Physics

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

Abstract

A theory is presented, describing Gilbert damping of a ferromagnetic layer by treating the outflow of the spin angular momentum to lattice and nonmagnetic systems on the same footing. The Mori formalism is applied to the entire system, including at the interface between different bulk (or film) systems. The Gilbert damping constant is determined from both Kamersky's spin-orbit-related torque correlation (TC) term and the hopping-related TC term. In addition, we confirm that the hopping-related TC term corresponds to conventional Gilbert damping enhanced by spin pumping.

Original language	English
Article number	8648534
Journal	IEEE Transactions on Magnetics
Volume	55
Issue number	7
DOIs	https://doi.org/10.1109/TMAG.2019.2893370
Publication status	Published - 2019 Jul

Keywords

Gilbert damping
Landau-Lifshitz-Gilbert (LLG) equation
spin dynamics

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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10.1109/TMAG.2019.2893370

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title = "Theoretical Study of Gilbert Damping Constants in Magnetic Multilayer Films",

abstract = "A theory is presented, describing Gilbert damping of a ferromagnetic layer by treating the outflow of the spin angular momentum to lattice and nonmagnetic systems on the same footing. The Mori formalism is applied to the entire system, including at the interface between different bulk (or film) systems. The Gilbert damping constant is determined from both Kamersky's spin-orbit-related torque correlation (TC) term and the hopping-related TC term. In addition, we confirm that the hopping-related TC term corresponds to conventional Gilbert damping enhanced by spin pumping.",

keywords = "Gilbert damping, Landau-Lifshitz-Gilbert (LLG) equation, spin dynamics",

author = "Dai Ozaki and Daisuke Miura and Akimasa Sakuma",

note = "Funding Information: This work was supported in part by JSPS KAKENHI under Grant 16K06702, Grant 16H02390, Grant 16H04322, and Grant 17K14800 in Japan. Publisher Copyright: {\textcopyright} 1965-2012 IEEE.",

year = "2019",

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doi = "10.1109/TMAG.2019.2893370",

language = "English",

volume = "55",

journal = "IEEE Transactions on Magnetics",

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AU - Ozaki, Dai

AU - Miura, Daisuke

AU - Sakuma, Akimasa

PY - 2019/7

Y1 - 2019/7

N2 - A theory is presented, describing Gilbert damping of a ferromagnetic layer by treating the outflow of the spin angular momentum to lattice and nonmagnetic systems on the same footing. The Mori formalism is applied to the entire system, including at the interface between different bulk (or film) systems. The Gilbert damping constant is determined from both Kamersky's spin-orbit-related torque correlation (TC) term and the hopping-related TC term. In addition, we confirm that the hopping-related TC term corresponds to conventional Gilbert damping enhanced by spin pumping.

AB - A theory is presented, describing Gilbert damping of a ferromagnetic layer by treating the outflow of the spin angular momentum to lattice and nonmagnetic systems on the same footing. The Mori formalism is applied to the entire system, including at the interface between different bulk (or film) systems. The Gilbert damping constant is determined from both Kamersky's spin-orbit-related torque correlation (TC) term and the hopping-related TC term. In addition, we confirm that the hopping-related TC term corresponds to conventional Gilbert damping enhanced by spin pumping.

KW - Gilbert damping

KW - Landau-Lifshitz-Gilbert (LLG) equation

KW - spin dynamics

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JO - IEEE Transactions on Magnetics

JF - IEEE Transactions on Magnetics

IS - 7

M1 - 8648534

ER -

Theoretical Study of Gilbert Damping Constants in Magnetic Multilayer Films

Abstract

Keywords

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