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Ferroelectrics Volume 331, 2006 - Issue 1
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Original Articles

Capacitance Temperature Sensor Using Ferroelectric (Sr0.95Ca0.05)TiO3 Perovskite

Kohei Shimada Department of Electronics and Communications, School of Science and Technology, Meiji University, Tama-ku, Kawasaki, 214-8571, Kanagawa, Japan; National Institute of Advanced Industrial Science and Technology, 1-1-1 Umezono, Tsukuba, 305-8568, Ibaraki, Japan
,
Hiroshi Takashima National Institute of Advanced Industrial Science and Technology, 1-1-1 Umezono, Tsukuba, 305-8568, Ibaraki, Japan
,
Ruiping Wang National Institute of Advanced Industrial Science and Technology, 1-1-1 Umezono, Tsukuba, 305-8568, Ibaraki, Japan
,
Bambang Prijamboedi National Institute of Advanced Industrial Science and Technology, 1-1-1 Umezono, Tsukuba, 305-8568, Ibaraki, Japan
,
Noboru Miura Department of Electronics and Communications, School of Science and Technology, Meiji University, Tama-ku, Kawasaki, 214-8571, Kanagawa, Japan
&
Mitsuru Itoh Materials and Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8503, Kanagawa, Japan
Pages 141-145 | Received 15 Nov 2005, Accepted 05 Jan 2006, Published online: 09 Mar 2011
 
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Thermometric properties of the capacitance temperature sensor with polycrystalline (Sr1−x Cax)TiO3 (x = 0.05) have been investigated at cryogenic temperatures. Ferroelectric state appeared at 31.8 K due to Ca doping. Temperature sensitivity S and dimensionless temperature sensitivity Sd at 2.5 K were 90 pF/K and 0.045, respectively. This capacitance temperature sensor could improve the accuracy of temperature sensing at cryogenic temperatures due to its large dimensionless temperature sensitivity.

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