Electrical properties of cobalt-doped zinc manganite ceramics for infrared detectors
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Zn1.10CoxMn1.90-xO4 (0 ≤ x ≤ 0.25) specimens were prepared using a conventional solid state reaction method. We investigatedthe structural and electrical properties with varying amounts of Co for application in IR detectors. All specimens exhibiteda very dense microstructure and the average grain size decreased slightly with an increase in the composition ratio of Co ions. The Zn1.10Co0.05Mn1.85O4 specimen shows the highest B-value of 5025 K, and the Zn1.10Co0.25Mn1.65O4 specimen shows theminimum resistivity of 100 kΩ • cm. The responsivity,s noise voltage and detectivity of the Zn1.10Co0.10Mn1.80O4 specimen are0.03 V/W, 6.36 × 10-5V and 2.0104 cmHz1/2/W, respectively.
Abstract
Zn1.10CoxMn1.90-xO4 (0 ≤ x ≤ 0.25) specimens were prepared using a conventional solid state reaction method. We investigatedthe structural and electrical properties with varying amounts of Co for application in IR detectors. All specimens exhibiteda very dense microstructure and the average grain size decreased slightly with an increase in the composition ratio of Co ions. The Zn1.10Co0.05Mn1.85O4 specimen shows the highest B-value of 5025 K, and the Zn1.10Co0.25Mn1.65O4 specimen shows theminimum resistivity of 100 kΩ • cm. The responsivity,s noise voltage and detectivity of the Zn1.10Co0.10Mn1.80O4 specimen are0.03 V/W, 6.36 × 10-5V and 2.0104 cmHz1/2/W, respectively.
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