Role of surface crystalline phases in magnetoimpedance in Co-based amorphous ribbons

C. G. Kim; C. O. Kim; S. S. Yoon; T. Stobiecki; W. Powroznik

doi:10.1016/S0304-8853(01)01069-1

Role of surface crystalline phases in magnetoimpedance in Co-based amorphous ribbons

C. G. Kim
, C. O. Kim
, S. S. Yoon
, T. Stobiecki
, W. Powroznik

Department of Physics and Chemistry

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

12 Scopus citations

Abstract

The giant magnetoimpedance (GMI) profile at 0.1 MHz shows one-peak behavior in vacuum-annealed samples at T = 380°C, irrespective of annealing time t_a from 20 to 480 min. For the samples annealed in open air, the GMI profile shows two peaks for t_a = 20 min annealed sample. However, one of the peaks disappears and the asymmetric GMI profile exhibits a drastic step-like change near zero field for t_a ≥300 min. Such an asymmetric GMI characteristic is probably due to the magnetic coupling of amorphous phase with a relatively hard magnetic phase on surface microstructures of FCC-Co, HCP-Co and Co₂Si crystalline phases.

Original language	English
Pages (from-to)	467-469
Number of pages	3
Journal	Journal of Magnetism and Magnetic Materials
Volume	242-245
Issue number	PART I
DOIs	https://doi.org/10.1016/S0304-8853(01)01069-1
State	Published - Apr 2002

Bibliographical note

Funding Information:
This work was supported by Electrical Engineering & Science Research Institute, and done in the program year of 2001, and by Korean Science and Engineering Foundation through ReCAMM at Chungnam National University in Korea.

Keywords

Amorphous
Field annealing
GMI
Surface crystalline

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10.1016/S0304-8853(01)01069-1

Cite this

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title = "Role of surface crystalline phases in magnetoimpedance in Co-based amorphous ribbons",

abstract = "The giant magnetoimpedance (GMI) profile at 0.1 MHz shows one-peak behavior in vacuum-annealed samples at T = 380°C, irrespective of annealing time ta from 20 to 480 min. For the samples annealed in open air, the GMI profile shows two peaks for ta = 20 min annealed sample. However, one of the peaks disappears and the asymmetric GMI profile exhibits a drastic step-like change near zero field for ta ≥300 min. Such an asymmetric GMI characteristic is probably due to the magnetic coupling of amorphous phase with a relatively hard magnetic phase on surface microstructures of FCC-Co, HCP-Co and Co2Si crystalline phases.",

keywords = "Amorphous, Field annealing, GMI, Surface crystalline",

author = "Kim, \{C. G.\} and Kim, \{C. O.\} and Yoon, \{S. S.\} and T. Stobiecki and W. Powroznik",

note = "Funding Information: This work was supported by Electrical Engineering \& Science Research Institute, and done in the program year of 2001, and by Korean Science and Engineering Foundation through ReCAMM at Chungnam National University in Korea.",

year = "2002",

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doi = "10.1016/S0304-8853(01)01069-1",

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T1 - Role of surface crystalline phases in magnetoimpedance in Co-based amorphous ribbons

AU - Kim, C. G.

AU - Kim, C. O.

AU - Yoon, S. S.

AU - Stobiecki, T.

AU - Powroznik, W.

N1 - Funding Information: This work was supported by Electrical Engineering & Science Research Institute, and done in the program year of 2001, and by Korean Science and Engineering Foundation through ReCAMM at Chungnam National University in Korea.

PY - 2002/4

Y1 - 2002/4

N2 - The giant magnetoimpedance (GMI) profile at 0.1 MHz shows one-peak behavior in vacuum-annealed samples at T = 380°C, irrespective of annealing time ta from 20 to 480 min. For the samples annealed in open air, the GMI profile shows two peaks for ta = 20 min annealed sample. However, one of the peaks disappears and the asymmetric GMI profile exhibits a drastic step-like change near zero field for ta ≥300 min. Such an asymmetric GMI characteristic is probably due to the magnetic coupling of amorphous phase with a relatively hard magnetic phase on surface microstructures of FCC-Co, HCP-Co and Co2Si crystalline phases.

AB - The giant magnetoimpedance (GMI) profile at 0.1 MHz shows one-peak behavior in vacuum-annealed samples at T = 380°C, irrespective of annealing time ta from 20 to 480 min. For the samples annealed in open air, the GMI profile shows two peaks for ta = 20 min annealed sample. However, one of the peaks disappears and the asymmetric GMI profile exhibits a drastic step-like change near zero field for ta ≥300 min. Such an asymmetric GMI characteristic is probably due to the magnetic coupling of amorphous phase with a relatively hard magnetic phase on surface microstructures of FCC-Co, HCP-Co and Co2Si crystalline phases.

KW - Amorphous

KW - Field annealing

KW - GMI

KW - Surface crystalline

UR - https://www.scopus.com/pages/publications/17444433563

U2 - 10.1016/S0304-8853(01)01069-1

DO - 10.1016/S0304-8853(01)01069-1

M3 - Article

AN - SCOPUS:17444433563

SN - 0304-8853

VL - 242-245

SP - 467

EP - 469

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

IS - PART I

ER -

Role of surface crystalline phases in magnetoimpedance in Co-based amorphous ribbons

Abstract

Bibliographical note

Keywords

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