Kotnala, R. K. and Shah, Jyoti and Gupta, Rekha (2013) Colossal humidoresistance in ceria added magnesium ferrite thin film by pulsed laser deposition. Sensors and Actuators B: Chemical, 181. 402-409. ISSN 0925-4005

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Abstract

Giant magnetoresistance (GMR) in multilayer thin films by applying an external magnetic field brought a breakthrough in the area of magnetic read heads. A colossal change in resistance has been observed in thin films by exposing it in humidity present in atmosphere. This effect can be best exploited for new type of energy conservative colossal humidoresistance (CHR) based device besides its established humidity sensor application. Here we report a colossal change in resistance of ceria added magnesium ferrite thin film prepared by pulsed laser deposition. A seven order (similar to 10(7)) decrease in resistance has been observed for such film. The humidoresistance [R(0% RH)-R(95% RH)]/R(95% RH) measured 3 x 10(6) for 1 wt.% ceria added magnesium ferrite film. The confirmation of physisorption of water molecules responsible for ionic conduction on film surface has been confirmed by impedance response of thin films with frequency at different humidity.

Item Type:	Article
Additional Information:	copyright for this article belongs to M/s Elsevier
Subjects:	Chemistry > Analytical Chemistry Electrochemistry Instruments/ Instrumentation
Divisions:	UNSPECIFIED
Depositing User:	Users 27 not found.
Date Deposited:	19 Aug 2026 10:39
Last Modified:	19 Aug 2026 10:39
URI:	https://npl.csircentral.net/id/eprint/3314

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