Impedance spectra of field-aligned CrO2 needle-shape powders

C. M. Fu; Y. C. Chao; S. H. Hung; C. P. Lin; J. Tang

doi:10.1016/j.jmmm.2004.04.066

Impedance spectra of field-aligned CrO₂ needle-shape powders

C. M. Fu^*, Y. C. Chao, S. H. Hung, C. P. Lin, J. Tang

^*Corresponding author for this work

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

3 Citations (Scopus)

Abstract

The frequency behaviour of the electrical properties of field-aligned CrO₂ needle-shape powders has been investigated by the impedance spectroscopy method. The low frequencies R(f) increase with increasing θ, the angles between the applied current direction and the easy axis of the aligned samples. The specific frequency, of which a maximum -X(f) occurred, is varied towards the lower ones as θ increased. Analysis, based on classical electromagnetism as well as equivalent circuit method, has been performed to disclose the mechanism underlying for AC conductivity.

Original language	English
Pages (from-to)	283-286
Number of pages	4
Journal	Journal of Magnetism and Magnetic Materials
Volume	282
Issue number	1-3
DOIs	https://doi.org/10.1016/j.jmmm.2004.04.066
Publication status	Published - 2004 Nov
Externally published	Yes
Event	International Symposium on Advanced Magnetic Technologies - Taipei, Taiwan Duration: 2003 Nov 13 → 2003 Nov 16

Keywords

Half-metal
Impedance spectroscopy
Magneto-resistance

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1016/j.jmmm.2004.04.066

Cite this

@article{7a04515373c24615b4b1f1900e0287c1,

title = "Impedance spectra of field-aligned CrO2 needle-shape powders",

abstract = "The frequency behaviour of the electrical properties of field-aligned CrO2 needle-shape powders has been investigated by the impedance spectroscopy method. The low frequencies R(f) increase with increasing θ, the angles between the applied current direction and the easy axis of the aligned samples. The specific frequency, of which a maximum -X(f) occurred, is varied towards the lower ones as θ increased. Analysis, based on classical electromagnetism as well as equivalent circuit method, has been performed to disclose the mechanism underlying for AC conductivity.",

keywords = "Half-metal, Impedance spectroscopy, Magneto-resistance",

author = "Fu, {C. M.} and Chao, {Y. C.} and Hung, {S. H.} and Lin, {C. P.} and J. Tang",

note = "Funding Information: This research was supported by the National Science Council, Taiwan under the Grant No. NSC 92-2120-M-017-001.; International Symposium on Advanced Magnetic Technologies ; Conference date: 13-11-2003 Through 16-11-2003",

year = "2004",

month = nov,

doi = "10.1016/j.jmmm.2004.04.066",

language = "English",

volume = "282",

pages = "283--286",

journal = "Journal of Magnetism and Magnetic Materials",

issn = "0304-8853",

publisher = "Elsevier",

number = "1-3",

}

TY - JOUR

T1 - Impedance spectra of field-aligned CrO2 needle-shape powders

AU - Fu, C. M.

AU - Chao, Y. C.

AU - Hung, S. H.

AU - Lin, C. P.

AU - Tang, J.

N1 - Funding Information: This research was supported by the National Science Council, Taiwan under the Grant No. NSC 92-2120-M-017-001.

PY - 2004/11

Y1 - 2004/11

N2 - The frequency behaviour of the electrical properties of field-aligned CrO2 needle-shape powders has been investigated by the impedance spectroscopy method. The low frequencies R(f) increase with increasing θ, the angles between the applied current direction and the easy axis of the aligned samples. The specific frequency, of which a maximum -X(f) occurred, is varied towards the lower ones as θ increased. Analysis, based on classical electromagnetism as well as equivalent circuit method, has been performed to disclose the mechanism underlying for AC conductivity.

AB - The frequency behaviour of the electrical properties of field-aligned CrO2 needle-shape powders has been investigated by the impedance spectroscopy method. The low frequencies R(f) increase with increasing θ, the angles between the applied current direction and the easy axis of the aligned samples. The specific frequency, of which a maximum -X(f) occurred, is varied towards the lower ones as θ increased. Analysis, based on classical electromagnetism as well as equivalent circuit method, has been performed to disclose the mechanism underlying for AC conductivity.

KW - Half-metal

KW - Impedance spectroscopy

KW - Magneto-resistance

UR - http://www.scopus.com/inward/record.url?scp=5744222358&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=5744222358&partnerID=8YFLogxK

U2 - 10.1016/j.jmmm.2004.04.066

DO - 10.1016/j.jmmm.2004.04.066

M3 - Conference article

AN - SCOPUS:5744222358

SN - 0304-8853

VL - 282

SP - 283

EP - 286

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

IS - 1-3

T2 - International Symposium on Advanced Magnetic Technologies

Y2 - 13 November 2003 through 16 November 2003

ER -