Magnetic field sensors from polycrystalline manganites

Citation
Yh. Xu et al., Magnetic field sensors from polycrystalline manganites, SENS ACTU-A, 91(1-2), 2001, pp. 26-29
Citations number
10
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Instrumentation & Measurement
Journal title
SENSORS AND ACTUATORS A-PHYSICAL
ISSN journal
0924-4247 → ACNP
Volume
91
Issue
1-2
Year of publication
2001
Pages
26 - 29
Database
ISI
SICI code
0924-4247(20010605)91:1-2<26:MFSFPM>2.0.ZU;2-O
Abstract
We report on the fabrication of magnetic sensors based on bulk La0.67Sr0.33 MnO3 and La0.67Ba0.33MnO3 material. The sensors were characterized at field s of 0-8 T and temperatures of 4.2-300 K. The sensors display a maximum sen sitivity of similar to 200%/T at room temperature within a field range of 1 -3 mT. For the sensor geometry investigated here, the low-field magnetoresi stance (MR) of the sensors measured in three field orientations with respec t to the sensor plane is strongly anisotropic. The high-field MR, in contra st, is found to be field-orientation independent. Periodic response of the sensor's resistance to the angle between the field and sensor-plane is demo nstrated at room temperature. (C) 2001 Elsevier Science B.V. All rights res erved.