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
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U2 - 10.1016/j.jmmm.2004.04.066
DO - 10.1016/j.jmmm.2004.04.066
M3 - Conference article
AN - SCOPUS:5744222358
VL - 282
SP - 283
EP - 286
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 -