Effect of laser annealing on permeability spectra in Co-based amorphous ribbon

K. J. Jang; S. J. Ahn; C. G. Kim; S. S. Yoon; S. C. Yu

Effect of laser annealing on permeability spectra in Co-based amorphous ribbon

K. J. Jang, S. J. Ahn, C. G. Kim, S. S. Yoon, S. C. Yu

Department of Physics and Chemistry

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

Abstract

We investigated the variation of permeability spectra and relaxation frequency in Co-based amorphous ribbon annealed by pulsed Nd:YAG laser at various annealing energy E_a. The complex permeability spectra varies sensitively with the annealing energy, where the spectra could be decomposed into two contributions from domain wall motion, μ_dw(f) and rotational magnetization μ_rot(f) by analyzing the measured spectra as a function of driving ac field amplitude. The magnitude of μ_dw(/) and μ_rot(f) in dc limit shows maximum at E_a = 176 mJ. The maximum relaxation frequency for rotational magnetization, determined by μ″(f) curve, is about 700 kHz at E_a=62 mJ but that for wall motion is about 26 kHz at 230 mJ. These variations reflect the increase of magnetic softness and microstructural change by the annealing.

Original language	English
Pages (from-to)	141-142
Number of pages	2
Journal	Journal of Materials Science and Technology
Volume	16
Issue number	2
State	Published - 2000

Cite this

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title = "Effect of laser annealing on permeability spectra in Co-based amorphous ribbon",

abstract = "We investigated the variation of permeability spectra and relaxation frequency in Co-based amorphous ribbon annealed by pulsed Nd:YAG laser at various annealing energy Ea. The complex permeability spectra varies sensitively with the annealing energy, where the spectra could be decomposed into two contributions from domain wall motion, μdw(f) and rotational magnetization μrot(f) by analyzing the measured spectra as a function of driving ac field amplitude. The magnitude of μdw(/) and μrot(f) in dc limit shows maximum at Ea = 176 mJ. The maximum relaxation frequency for rotational magnetization, determined by μ″(f) curve, is about 700 kHz at Ea=62 mJ but that for wall motion is about 26 kHz at 230 mJ. These variations reflect the increase of magnetic softness and microstructural change by the annealing.",

author = "Jang, \{K. J.\} and Ahn, \{S. J.\} and Kim, \{C. G.\} and Yoon, \{S. S.\} and Yu, \{S. C.\}",

year = "2000",

language = "English",

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pages = "141--142",

journal = "Journal of Materials Science and Technology",

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T1 - Effect of laser annealing on permeability spectra in Co-based amorphous ribbon

AU - Jang, K. J.

AU - Ahn, S. J.

AU - Kim, C. G.

AU - Yoon, S. S.

AU - Yu, S. C.

PY - 2000

Y1 - 2000

N2 - We investigated the variation of permeability spectra and relaxation frequency in Co-based amorphous ribbon annealed by pulsed Nd:YAG laser at various annealing energy Ea. The complex permeability spectra varies sensitively with the annealing energy, where the spectra could be decomposed into two contributions from domain wall motion, μdw(f) and rotational magnetization μrot(f) by analyzing the measured spectra as a function of driving ac field amplitude. The magnitude of μdw(/) and μrot(f) in dc limit shows maximum at Ea = 176 mJ. The maximum relaxation frequency for rotational magnetization, determined by μ″(f) curve, is about 700 kHz at Ea=62 mJ but that for wall motion is about 26 kHz at 230 mJ. These variations reflect the increase of magnetic softness and microstructural change by the annealing.

AB - We investigated the variation of permeability spectra and relaxation frequency in Co-based amorphous ribbon annealed by pulsed Nd:YAG laser at various annealing energy Ea. The complex permeability spectra varies sensitively with the annealing energy, where the spectra could be decomposed into two contributions from domain wall motion, μdw(f) and rotational magnetization μrot(f) by analyzing the measured spectra as a function of driving ac field amplitude. The magnitude of μdw(/) and μrot(f) in dc limit shows maximum at Ea = 176 mJ. The maximum relaxation frequency for rotational magnetization, determined by μ″(f) curve, is about 700 kHz at Ea=62 mJ but that for wall motion is about 26 kHz at 230 mJ. These variations reflect the increase of magnetic softness and microstructural change by the annealing.

UR - https://www.scopus.com/pages/publications/0034155524

M3 - Article

AN - SCOPUS:0034155524

SN - 1005-0302

VL - 16

SP - 141

EP - 142

JO - Journal of Materials Science and Technology

JF - Journal of Materials Science and Technology

IS - 2

ER -

Effect of laser annealing on permeability spectra in Co-based amorphous ribbon

Abstract

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