Anomalous magnetoimpedance in Co-Fe-Al-O thin films

L. A. Tuan; M. H. Phan; N. D. Ha; C. G. Kim; C. O. Kim; S. C. Yu

doi:10.1002/pssc.200777175

Anomalous magnetoimpedance in Co-Fe-Al-O thin films

L. A. Tuan, M. H. Phan, N. D. Ha, C. G. Kim, C. O. Kim, S. C. Yu

Department of Physics and Chemistry

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

1 Scopus citations

Abstract

The high-frequency giant magnetoimpedance (GMI) effect in a Co _47.5Fe_21.9Al_17.2O_15.2 thin film was systematically investigated. In the frequency range of 100-500 MHz, GMI profiles showed a double-peak characteristic, reflecting an evident existence of the transverse magnetic anisotropy in the film, which coincided with the magnetization data. Interestingly, there was an anomalous transformation in the GMI profile from "positive" to "negative" and this was associated with the complex phase transformation of permeability. The GMI ratio decreased with decreasing film-thickness, due to an increase of the electrical resistivity and a decrease of the magnetic softness.

Original language	English
Pages (from-to)	4392-4395
Number of pages	4
Journal	Physica Status Solidi (C) Current Topics in Solid State Physics
Volume	4
Issue number	12
DOIs	https://doi.org/10.1002/pssc.200777175
State	Published - 2007
Event	International Symposium on Advanced Magnetic Materials and Appilications, (ISAMMA 2007) - Jeju, Korea, Republic of Duration: 28 May 2007 → 1 Jun 2007

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title = "Anomalous magnetoimpedance in Co-Fe-Al-O thin films",

abstract = "The high-frequency giant magnetoimpedance (GMI) effect in a Co 47.5Fe21.9Al17.2O15.2 thin film was systematically investigated. In the frequency range of 100-500 MHz, GMI profiles showed a double-peak characteristic, reflecting an evident existence of the transverse magnetic anisotropy in the film, which coincided with the magnetization data. Interestingly, there was an anomalous transformation in the GMI profile from {"}positive{"} to {"}negative{"} and this was associated with the complex phase transformation of permeability. The GMI ratio decreased with decreasing film-thickness, due to an increase of the electrical resistivity and a decrease of the magnetic softness.",

author = "Tuan, \{L. A.\} and Phan, \{M. H.\} and Ha, \{N. D.\} and Kim, \{C. G.\} and Kim, \{C. O.\} and Yu, \{S. C.\}",

year = "2007",

doi = "10.1002/pssc.200777175",

language = "English",

volume = "4",

pages = "4392--4395",

journal = "Physica Status Solidi (C) Current Topics in Solid State Physics",

issn = "1862-6351",

publisher = "Wiley-VCH Verlag",

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note = "International Symposium on Advanced Magnetic Materials and Appilications, (ISAMMA 2007) ; Conference date: 28-05-2007 Through 01-06-2007",

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TY - JOUR

T1 - Anomalous magnetoimpedance in Co-Fe-Al-O thin films

AU - Tuan, L. A.

AU - Phan, M. H.

AU - Ha, N. D.

AU - Kim, C. G.

AU - Kim, C. O.

AU - Yu, S. C.

PY - 2007

Y1 - 2007

N2 - The high-frequency giant magnetoimpedance (GMI) effect in a Co 47.5Fe21.9Al17.2O15.2 thin film was systematically investigated. In the frequency range of 100-500 MHz, GMI profiles showed a double-peak characteristic, reflecting an evident existence of the transverse magnetic anisotropy in the film, which coincided with the magnetization data. Interestingly, there was an anomalous transformation in the GMI profile from "positive" to "negative" and this was associated with the complex phase transformation of permeability. The GMI ratio decreased with decreasing film-thickness, due to an increase of the electrical resistivity and a decrease of the magnetic softness.

AB - The high-frequency giant magnetoimpedance (GMI) effect in a Co 47.5Fe21.9Al17.2O15.2 thin film was systematically investigated. In the frequency range of 100-500 MHz, GMI profiles showed a double-peak characteristic, reflecting an evident existence of the transverse magnetic anisotropy in the film, which coincided with the magnetization data. Interestingly, there was an anomalous transformation in the GMI profile from "positive" to "negative" and this was associated with the complex phase transformation of permeability. The GMI ratio decreased with decreasing film-thickness, due to an increase of the electrical resistivity and a decrease of the magnetic softness.

UR - https://www.scopus.com/pages/publications/38349180724

U2 - 10.1002/pssc.200777175

DO - 10.1002/pssc.200777175

M3 - Conference article

AN - SCOPUS:38349180724

SN - 1862-6351

VL - 4

SP - 4392

EP - 4395

JO - Physica Status Solidi (C) Current Topics in Solid State Physics

JF - Physica Status Solidi (C) Current Topics in Solid State Physics

IS - 12

T2 - International Symposium on Advanced Magnetic Materials and Appilications, (ISAMMA 2007)

Y2 - 28 May 2007 through 1 June 2007

ER -

Anomalous magnetoimpedance in Co-Fe-Al-O thin films

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