Incipient ferroelectricity and microwave dielectric resonance properties of CaCu[sub 2.85]Mn[sub 0.15]Ti[sub 4]O[sub 12] ceramics

LI, Ming, FETEIRA, Antonio, SINCLAIR, Derek C. and WEST, Anthony R. (2007). Incipient ferroelectricity and microwave dielectric resonance properties of CaCu[sub 2.85]Mn[sub 0.15]Ti[sub 4]O[sub 12] ceramics. Applied Physics Letters, 91 (13), p. 132911.

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Official URL: http://dx.doi.org/10.1063/1.2769954
Link to published version:: 10.1063/1.2769954

Abstract

Mn-doped CaCu3Ti4O12 ceramics with nominal composition CaCu2.85Mn0.15Ti4O12 (CCMTO) have been prepared and their radio- and micro-wave dielectric properties established. At 300 K, dense CCMTO ceramics have appreciable grain resistivity, ∼20 MΩ cm, and exhibit microwave dielectric resonance with εr∼93, Qf∼3950 GHz (at 3.95 GHz) and temperature coefficient of resonant frequency ∼+657 ppm/K. εr decreases smoothly from ∼150 to 90 in the range of 10–300 K, obeys the Curie-Weiss law in the range of ∼60–180 K, and is consistent with incipient ferroelectricity. The source of the incipient ferroelectricity and potential applications of CCMTO ceramics are discussed.

Item Type: Article
Research Institute, Centre or Group: Materials and Engineering Research Institute > Structural Materials and Integrity Research Centre > Centre for Corrosion Technology
Identification Number: 10.1063/1.2769954
Depositing User: Hilary Ridgway
Date Deposited: 06 Jun 2012 15:58
Last Modified: 06 Jun 2012 15:58
URI: http://shura.shu.ac.uk/id/eprint/5331

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