Critical phenomena in magnetic vortex formation probed by noise spectroscopy

E. Saitoh; K. Harii; H. Miyajima; T. Yamaoka

doi:10.1016/j.jmmm.2004.04.007

Critical phenomena in magnetic vortex formation probed by noise spectroscopy

E. Saitoh, K. Harii, H. Miyajima, T. Yamaoka

Advanced Institute for Materials Research (AIMR)

Research output: Contribution to journal › Conference article › peer-review

1 Citation (Scopus)

Abstract

Transition between a vortex magnetic state and a uniform magnetic state in a Ni₈₁Fe₁₉ mesoscopic ring has been investigated in terms of resistive-noise spectroscopy. The observed low-frequency noise exhibits critical enhancement around the magnetization saturation. This noise enhancement can be argued from the viewpoint of the critical phenomena due to the chiral-symmetry breakdown of mesoscopic magnetic-structure, which can present a typical mechanism of symmetry transition of magnetic structure in mesoscopic ferromagnets.

Original language	English
Pages (from-to)	25-27
Number of pages	3
Journal	Journal of Magnetism and Magnetic Materials
Volume	282
Issue number	1-3
DOIs	https://doi.org/10.1016/j.jmmm.2004.04.007
Publication status	Published - 2004 Nov 1
Event	International Symposium on Advanced Magnetic Technologies - Taipei, Taiwan, Province of China Duration: 2003 Nov 13 → 2003 Nov 16

Keywords

Critical phenomena
Nano magnetics
Nano ring

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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title = "Critical phenomena in magnetic vortex formation probed by noise spectroscopy",

abstract = "Transition between a vortex magnetic state and a uniform magnetic state in a Ni81Fe19 mesoscopic ring has been investigated in terms of resistive-noise spectroscopy. The observed low-frequency noise exhibits critical enhancement around the magnetization saturation. This noise enhancement can be argued from the viewpoint of the critical phenomena due to the chiral-symmetry breakdown of mesoscopic magnetic-structure, which can present a typical mechanism of symmetry transition of magnetic structure in mesoscopic ferromagnets.",

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author = "E. Saitoh and K. Harii and H. Miyajima and T. Yamaoka",

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T1 - Critical phenomena in magnetic vortex formation probed by noise spectroscopy

AU - Saitoh, E.

AU - Harii, K.

AU - Miyajima, H.

AU - Yamaoka, T.

PY - 2004/11/1

Y1 - 2004/11/1

N2 - Transition between a vortex magnetic state and a uniform magnetic state in a Ni81Fe19 mesoscopic ring has been investigated in terms of resistive-noise spectroscopy. The observed low-frequency noise exhibits critical enhancement around the magnetization saturation. This noise enhancement can be argued from the viewpoint of the critical phenomena due to the chiral-symmetry breakdown of mesoscopic magnetic-structure, which can present a typical mechanism of symmetry transition of magnetic structure in mesoscopic ferromagnets.

AB - Transition between a vortex magnetic state and a uniform magnetic state in a Ni81Fe19 mesoscopic ring has been investigated in terms of resistive-noise spectroscopy. The observed low-frequency noise exhibits critical enhancement around the magnetization saturation. This noise enhancement can be argued from the viewpoint of the critical phenomena due to the chiral-symmetry breakdown of mesoscopic magnetic-structure, which can present a typical mechanism of symmetry transition of magnetic structure in mesoscopic ferromagnets.

KW - Critical phenomena

KW - Nano magnetics

KW - Nano ring

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DO - 10.1016/j.jmmm.2004.04.007

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AN - SCOPUS:5744252549

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SP - 25

EP - 27

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

SN - 0304-8853

IS - 1-3

T2 - International Symposium on Advanced Magnetic Technologies

Y2 - 13 November 2003 through 16 November 2003

ER -

Critical phenomena in magnetic vortex formation probed by noise spectroscopy

Abstract

Keywords

ASJC Scopus subject areas

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