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Vol. 14-1, Special Issue, March 2012, pp.253-265

 

Bullet

 

La0.7Sr0.3MnO3 Thin Films for Magnetic and Temperature Sensors at Room Temperature

 

Sheng Wu, Dalal Fadil, Shuang Liu, Ammar Aryan, Benoit Renault, Jean-Marc Routoure, Bruno Guillet,
Stéphane Flament, Pierre Langlois and Laurence Méchin

Université de Caen Basse-Normandie, UMR 6072 GREYC, F-14032 Caen, France

ENSICAEN, UMR 6072 GREYC, F-14050 Caen, France

CNRS, UMR 6072 GREYC, F-14032 Caen, France

E-mail: laurence.mechin@ensicaen.fr

 

Received: 16 November 2011   /Accepted: 20 December 2011   /Published: 12 March 2012

Digital Sensors and Sensor Sysstems

 

Abstract: In this paper, the potentialities of the manganese oxide La0.7Sr0.3MnO3 (LSMO) for the realization of sensitive room temperature thermometers and magnetic sensors are discussed. LSMO exhibits both a large change of the resistance versus temperature at its metal-to-insulator transition (about 330 K) and low field magnetoresistive effects at room temperature. The sensor performances are described in terms of signal-to-noise ratio in the 1 Hz - 100 kHz frequency range. It is shown that due to the very low 1/f noise level, LSMO based sensors can exhibit competitive performances at room temperature.

 

Keywords: Low frequency noise, Magnetoresistance sensors, Thermometers

 

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