Imaging of transient magnetization dynamics of Co/Pt multilayer dots with X-ray magnetic circular dichroism excited by microwaves

N. Kikuchi; T. Yomogita; K. Sato; S. Okamoto; O. Kitakami; H. Osawa; M. Suzuki; K. Toyoki; Y. Kotani; T. Nakamura

doi:10.35848/1347-4065/ab6cb1

Imaging of transient magnetization dynamics of Co/Pt multilayer dots with X-ray magnetic circular dichroism excited by microwaves

N. Kikuchi, T. Yomogita, K. Sato, S. Okamoto, O. Kitakami, H. Osawa, M. Suzuki, K. Toyoki, Y. Kotani, T. Nakamura

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

Abstract

We investigated the magnetization dynamics of Co/Pt multilayer dots with diameters in the micron scale by X-ray magnetic circular dichroism (XMCD) with a focused beam with submicron dimensions. XMCD measurement with soft and hard X-rays revealed that the magnetic moments of Co and Pt strongly couple and precess with the same cone angle in ferromagnetic resonance conditions. The transient magnetization behavior of Co/Pt multilayer dots was investigated by pump-probe XMCD measurement with a scanning focused X-ray beam. A non-uniform magnetization distribution with concentric geometry including the phase of magnetization precession was visualized with excitation frequencies up to 3.05 GHz.

Original language	English
Article number	SEED03
Journal	Japanese Journal of Applied Physics
Volume	59
Issue number	SE
DOIs	https://doi.org/10.35848/1347-4065/ab6cb1
Publication status	Published - 2020

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title = "Imaging of transient magnetization dynamics of Co/Pt multilayer dots with X-ray magnetic circular dichroism excited by microwaves",

abstract = "We investigated the magnetization dynamics of Co/Pt multilayer dots with diameters in the micron scale by X-ray magnetic circular dichroism (XMCD) with a focused beam with submicron dimensions. XMCD measurement with soft and hard X-rays revealed that the magnetic moments of Co and Pt strongly couple and precess with the same cone angle in ferromagnetic resonance conditions. The transient magnetization behavior of Co/Pt multilayer dots was investigated by pump-probe XMCD measurement with a scanning focused X-ray beam. A non-uniform magnetization distribution with concentric geometry including the phase of magnetization precession was visualized with excitation frequencies up to 3.05 GHz.",

author = "N. Kikuchi and T. Yomogita and K. Sato and S. Okamoto and O. Kitakami and H. Osawa and M. Suzuki and K. Toyoki and Y. Kotani and T. Nakamura",

note = "Publisher Copyright: {\textcopyright} 2020 The Japan Society of Applied Physics.",

year = "2020",

doi = "10.35848/1347-4065/ab6cb1",

language = "English",

volume = "59",

journal = "Japanese Journal of Applied Physics",

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TY - JOUR

T1 - Imaging of transient magnetization dynamics of Co/Pt multilayer dots with X-ray magnetic circular dichroism excited by microwaves

AU - Kikuchi, N.

AU - Yomogita, T.

AU - Sato, K.

AU - Okamoto, S.

AU - Kitakami, O.

AU - Osawa, H.

AU - Suzuki, M.

AU - Toyoki, K.

AU - Kotani, Y.

AU - Nakamura, T.

PY - 2020

Y1 - 2020

N2 - We investigated the magnetization dynamics of Co/Pt multilayer dots with diameters in the micron scale by X-ray magnetic circular dichroism (XMCD) with a focused beam with submicron dimensions. XMCD measurement with soft and hard X-rays revealed that the magnetic moments of Co and Pt strongly couple and precess with the same cone angle in ferromagnetic resonance conditions. The transient magnetization behavior of Co/Pt multilayer dots was investigated by pump-probe XMCD measurement with a scanning focused X-ray beam. A non-uniform magnetization distribution with concentric geometry including the phase of magnetization precession was visualized with excitation frequencies up to 3.05 GHz.

AB - We investigated the magnetization dynamics of Co/Pt multilayer dots with diameters in the micron scale by X-ray magnetic circular dichroism (XMCD) with a focused beam with submicron dimensions. XMCD measurement with soft and hard X-rays revealed that the magnetic moments of Co and Pt strongly couple and precess with the same cone angle in ferromagnetic resonance conditions. The transient magnetization behavior of Co/Pt multilayer dots was investigated by pump-probe XMCD measurement with a scanning focused X-ray beam. A non-uniform magnetization distribution with concentric geometry including the phase of magnetization precession was visualized with excitation frequencies up to 3.05 GHz.

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DO - 10.35848/1347-4065/ab6cb1

M3 - Article

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SN - 0021-4922

VL - 59

JO - Japanese Journal of Applied Physics

JF - Japanese Journal of Applied Physics

IS - SE

M1 - SEED03

ER -

Imaging of transient magnetization dynamics of Co/Pt multilayer dots with X-ray magnetic circular dichroism excited by microwaves

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