Characterization of a nano-oxide layer in a pseudo spin valve by complex magneto-Impedance spectroscopy

W. C. Chien; C. K. Lo

doi:10.1109/TMAG.2006.879730

Characterization of a nano-oxide layer in a pseudo spin valve by complex magneto-Impedance spectroscopy

W. C. Chien, C. K. Lo

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

7 Citations (Scopus)

Abstract

The ac properties of a pseudo spin valve (PSV) consisting of NOL_top/Co/Cu/Co/Ni₈₀Fe₂₀/NOL_bottom with a top and bottom nano-oxide layer (NOL) were studied as functions of NOL and thickness, d, by magneto impedance spectroscopy. The NOLs were formed by natural oxidizing the top and bottom ferromagnetic or Ta layers in situ. The increase in the thickness of NOL resulting in the increment of effective capacitance caused the shift of roll-off frequency from low to high. The frequency dependence behavior of this NOL_top/PSV/NOL_bottom system can be modeled by equivalent circuit theory. PSV with a different NOL structure can be checked by such a nondestructive analysis method.

Original language	English
Pages (from-to)	2624-2626
Number of pages	3
Journal	IEEE Transactions on Magnetics
Volume	42
Issue number	10
DOIs	https://doi.org/10.1109/TMAG.2006.879730
Publication status	Published - 2006 Oct
Externally published	Yes

Keywords

Magneto-capacitance
magneto-impedance
nano-oxide layer
pseudo spin valve
roll-off frequency

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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10.1109/TMAG.2006.879730

Cite this

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abstract = "The ac properties of a pseudo spin valve (PSV) consisting of NOLtop/Co/Cu/Co/Ni80Fe20/NOLbottom with a top and bottom nano-oxide layer (NOL) were studied as functions of NOL and thickness, d, by magneto impedance spectroscopy. The NOLs were formed by natural oxidizing the top and bottom ferromagnetic or Ta layers in situ. The increase in the thickness of NOL resulting in the increment of effective capacitance caused the shift of roll-off frequency from low to high. The frequency dependence behavior of this NOLtop/PSV/NOLbottom system can be modeled by equivalent circuit theory. PSV with a different NOL structure can be checked by such a nondestructive analysis method.",

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AU - Chien, W. C.

AU - Lo, C. K.

PY - 2006/10

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N2 - The ac properties of a pseudo spin valve (PSV) consisting of NOLtop/Co/Cu/Co/Ni80Fe20/NOLbottom with a top and bottom nano-oxide layer (NOL) were studied as functions of NOL and thickness, d, by magneto impedance spectroscopy. The NOLs were formed by natural oxidizing the top and bottom ferromagnetic or Ta layers in situ. The increase in the thickness of NOL resulting in the increment of effective capacitance caused the shift of roll-off frequency from low to high. The frequency dependence behavior of this NOLtop/PSV/NOLbottom system can be modeled by equivalent circuit theory. PSV with a different NOL structure can be checked by such a nondestructive analysis method.

AB - The ac properties of a pseudo spin valve (PSV) consisting of NOLtop/Co/Cu/Co/Ni80Fe20/NOLbottom with a top and bottom nano-oxide layer (NOL) were studied as functions of NOL and thickness, d, by magneto impedance spectroscopy. The NOLs were formed by natural oxidizing the top and bottom ferromagnetic or Ta layers in situ. The increase in the thickness of NOL resulting in the increment of effective capacitance caused the shift of roll-off frequency from low to high. The frequency dependence behavior of this NOLtop/PSV/NOLbottom system can be modeled by equivalent circuit theory. PSV with a different NOL structure can be checked by such a nondestructive analysis method.

KW - Magneto-capacitance

KW - magneto-impedance

KW - nano-oxide layer

KW - pseudo spin valve

KW - roll-off frequency

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Characterization of a nano-oxide layer in a pseudo spin valve by complex magneto-Impedance spectroscopy

Abstract

Keywords

ASJC Scopus subject areas

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