Abstract
Impedance spectroscopy in conjunction with capacitance measurements were utilized to study the electrical contact behavior of commercial positive temperature coefficient and negative temperature coefficient ceramics. The impedance spectroscopy data, measured at frequencies ranging from 100 Hz to 40 MHz, exhibited a double semi-circle shape characteristic of systems which have both barrier and bulk contributions to the impedance of the device. From the impedance data, equivalent capacitive-resistive circuits were assigned to grain, grain boundary, and barrier elements. These barrier capacitances and resistances were measured for Au, Ag, Pt, and In-Ga electrodes. The trends in the magnitude of the barrier resistance are discussed with relevance to the thermodynamic work of adhesion and the effect of metal-oxygen and metal-metal interactions at the interface.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1628-1632 |
| Number of pages | 5 |
| Journal | Journal of Applied Physics |
| Volume | 80 |
| Issue number | 3 |
| DOIs | |
| State | Published - Aug 1 1996 |
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All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)
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Electrode effects in positive temperature coefficient and negative temperature coefficient devices measured by complex-plane impedance analysis. / Cann, D. P.; Randall, Clive A.
In: Journal of Applied Physics, Vol. 80, No. 3, 01.08.1996, p. 1628-1632.Research output: Contribution to journal › Article
TY - JOUR
T1 - Electrode effects in positive temperature coefficient and negative temperature coefficient devices measured by complex-plane impedance analysis
AU - Cann, D. P.
AU - Randall, Clive A.
PY - 1996/8/1
Y1 - 1996/8/1
N2 - Impedance spectroscopy in conjunction with capacitance measurements were utilized to study the electrical contact behavior of commercial positive temperature coefficient and negative temperature coefficient ceramics. The impedance spectroscopy data, measured at frequencies ranging from 100 Hz to 40 MHz, exhibited a double semi-circle shape characteristic of systems which have both barrier and bulk contributions to the impedance of the device. From the impedance data, equivalent capacitive-resistive circuits were assigned to grain, grain boundary, and barrier elements. These barrier capacitances and resistances were measured for Au, Ag, Pt, and In-Ga electrodes. The trends in the magnitude of the barrier resistance are discussed with relevance to the thermodynamic work of adhesion and the effect of metal-oxygen and metal-metal interactions at the interface.
AB - Impedance spectroscopy in conjunction with capacitance measurements were utilized to study the electrical contact behavior of commercial positive temperature coefficient and negative temperature coefficient ceramics. The impedance spectroscopy data, measured at frequencies ranging from 100 Hz to 40 MHz, exhibited a double semi-circle shape characteristic of systems which have both barrier and bulk contributions to the impedance of the device. From the impedance data, equivalent capacitive-resistive circuits were assigned to grain, grain boundary, and barrier elements. These barrier capacitances and resistances were measured for Au, Ag, Pt, and In-Ga electrodes. The trends in the magnitude of the barrier resistance are discussed with relevance to the thermodynamic work of adhesion and the effect of metal-oxygen and metal-metal interactions at the interface.
UR - http://www.scopus.com/inward/record.url?scp=0006607784&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0006607784&partnerID=8YFLogxK
U2 - 10.1063/1.362961
DO - 10.1063/1.362961
M3 - Article
AN - SCOPUS:0006607784
VL - 80
SP - 1628
EP - 1632
JO - Journal of Applied Physics
JF - Journal of Applied Physics
SN - 0021-8979
IS - 3
ER -