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

Sheng Wu (1) , Dalal Fadil (1) , Shuang Liu (1) , Ammar Aryan (1) , B. Renault (1) , Jean-Marc Routoure (1) , Bruno Guillet (1) , Stéphane Flament (1) , Pierre Langlois (1) , Laurence Méchin (1)

1 Equipe Electronique - Laboratoire GREYC - UMR6072

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.

Mots clés: Thermometers; Magnetoresistance sensors; Low frequency noise

Domaines: Sciences de l'ingénieur [physics]; Micro et nanotechnologies/Microélectronique

Sheng Wu, Dalal Fadil, Shuang Liu, Ammar Aryan, B. Renault, et al.. La0.7Sr0.3MnO3 Thin Films for Magnetic and Temperature Sensors at Room Temperature. Sensors & Transducers., 2012, p.253-265. ⟨hal-00976579⟩