Relationship between Gilbert damping and magneto-crystalline anisotropy in a Ti-buffered Co/Ni multilayer system

Hyon Seok Song; Kyeong Dong Lee; Jeong Woo Sohn; See Hun Yang; Stuart S.P. Parkin; Chun Yeol You; Sung Chul Shin

doi:10.1063/1.4813542

Relationship between Gilbert damping and magneto-crystalline anisotropy in a Ti-buffered Co/Ni multilayer system

Hyon Seok Song
, Kyeong Dong Lee
, Jeong Woo Sohn
, See Hun Yang
, Stuart S.P. Parkin
, Chun Yeol You
, Sung Chul Shin

Department of Physics and Chemistry

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

64 Scopus citations

Abstract

The relationship between Gilbert damping and magneto-crystalline anisotropy is studied here using an all-optical method in a perpendicular Co/Ni multilayer system by varying the Ti-buffer thickness. As the Ti-buffer thickness increases, the magneto-crystalline anisotropy is enhanced. The time-resolved Kerr signal of each sample is well described by its own intrinsic Gilbert damping constant in a wide range of the external magnetic field. Interestingly, we find that Gilbert damping constants increase linearly from 0.021 to 0.036 when the magneto-crystalline anisotropy of the samples varies from 2.4 to 3.4 Merg/cm³. Such a linear relationship implies that the spin-orbit interaction is the main source of the damping process through spin-lattice relaxation in our system.

Original language	English
Article number	022406
Journal	Applied Physics Letters
Volume	103
Issue number	2
DOIs	https://doi.org/10.1063/1.4813542
State	Published - 8 Jul 2013

Bibliographical note

Funding Information:
This work was supported by the DGIST R&D Program of the Ministry of Education, Science and Technology of Korea (11-IT-01). It was also supported by a grant from the National Research Foundation of Korea (NRF) funded by the Korean government (MEST) (Grant Nos. NRF-2007-0056631, 2010-0023798, 2010-0022040, and 2012R1A1A1041590).

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@article{3578181fee0547bba1d0b3fd41c16526,

title = "Relationship between Gilbert damping and magneto-crystalline anisotropy in a Ti-buffered Co/Ni multilayer system",

abstract = "The relationship between Gilbert damping and magneto-crystalline anisotropy is studied here using an all-optical method in a perpendicular Co/Ni multilayer system by varying the Ti-buffer thickness. As the Ti-buffer thickness increases, the magneto-crystalline anisotropy is enhanced. The time-resolved Kerr signal of each sample is well described by its own intrinsic Gilbert damping constant in a wide range of the external magnetic field. Interestingly, we find that Gilbert damping constants increase linearly from 0.021 to 0.036 when the magneto-crystalline anisotropy of the samples varies from 2.4 to 3.4 Merg/cm3. Such a linear relationship implies that the spin-orbit interaction is the main source of the damping process through spin-lattice relaxation in our system.",

author = "Song, \{Hyon Seok\} and Lee, \{Kyeong Dong\} and Sohn, \{Jeong Woo\} and Yang, \{See Hun\} and Parkin, \{Stuart S.P.\} and You, \{Chun Yeol\} and Shin, \{Sung Chul\}",

note = "Funding Information: This work was supported by the DGIST R\&D Program of the Ministry of Education, Science and Technology of Korea (11-IT-01). It was also supported by a grant from the National Research Foundation of Korea (NRF) funded by the Korean government (MEST) (Grant Nos. NRF-2007-0056631, 2010-0023798, 2010-0022040, and 2012R1A1A1041590).",

year = "2013",

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doi = "10.1063/1.4813542",

language = "English",

volume = "103",

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T1 - Relationship between Gilbert damping and magneto-crystalline anisotropy in a Ti-buffered Co/Ni multilayer system

AU - Song, Hyon Seok

AU - Lee, Kyeong Dong

AU - Sohn, Jeong Woo

AU - Yang, See Hun

AU - Parkin, Stuart S.P.

AU - You, Chun Yeol

AU - Shin, Sung Chul

N1 - Funding Information: This work was supported by the DGIST R&D Program of the Ministry of Education, Science and Technology of Korea (11-IT-01). It was also supported by a grant from the National Research Foundation of Korea (NRF) funded by the Korean government (MEST) (Grant Nos. NRF-2007-0056631, 2010-0023798, 2010-0022040, and 2012R1A1A1041590).

PY - 2013/7/8

Y1 - 2013/7/8

N2 - The relationship between Gilbert damping and magneto-crystalline anisotropy is studied here using an all-optical method in a perpendicular Co/Ni multilayer system by varying the Ti-buffer thickness. As the Ti-buffer thickness increases, the magneto-crystalline anisotropy is enhanced. The time-resolved Kerr signal of each sample is well described by its own intrinsic Gilbert damping constant in a wide range of the external magnetic field. Interestingly, we find that Gilbert damping constants increase linearly from 0.021 to 0.036 when the magneto-crystalline anisotropy of the samples varies from 2.4 to 3.4 Merg/cm3. Such a linear relationship implies that the spin-orbit interaction is the main source of the damping process through spin-lattice relaxation in our system.

AB - The relationship between Gilbert damping and magneto-crystalline anisotropy is studied here using an all-optical method in a perpendicular Co/Ni multilayer system by varying the Ti-buffer thickness. As the Ti-buffer thickness increases, the magneto-crystalline anisotropy is enhanced. The time-resolved Kerr signal of each sample is well described by its own intrinsic Gilbert damping constant in a wide range of the external magnetic field. Interestingly, we find that Gilbert damping constants increase linearly from 0.021 to 0.036 when the magneto-crystalline anisotropy of the samples varies from 2.4 to 3.4 Merg/cm3. Such a linear relationship implies that the spin-orbit interaction is the main source of the damping process through spin-lattice relaxation in our system.

UR - https://www.scopus.com/pages/publications/84880504572

U2 - 10.1063/1.4813542

DO - 10.1063/1.4813542

M3 - Article

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VL - 103

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 2

M1 - 022406

ER -

Relationship between Gilbert damping and magneto-crystalline anisotropy in a Ti-buffered Co/Ni multilayer system

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