TY - JOUR
T1 - Magnetoresistive thick film sensor for linear displacements
AU - Morten, B.
AU - De Cicco, G.
AU - Prudenziati, M.
AU - Masoero, A.
AU - Mihai, G.
PY - 1995
Y1 - 1995
N2 - A new thick film material has been developed starting from Ni and Co powders in the ratio Ni:Co = 3:1. The thermal treatment (in N2, up to 950 °C) of the metal films deposited on glazed alumina enables the in situ formation of the NiCo alloy. The films as created exhibit a high longitudinal (current I parallel to the field B) magnetoresistive response with ΔR/R ≈4% at 1.2 kGauss, and a negligible transverse one. The temperature coefficient of resistance (TCR) is ≈2700 ppm °C−1. These properties make the new material superior, from the point of view of magnetoresistive applications, to the Ni-based currently available thick film conductors. Contactless sensors for linear displacements have been created with the sensor's structure enclosing either Ni-based and Ni/Co-based meanders, having two magnetoresistive elements on each side of the substrate. This paper compares the magnetoresistive and thermoresistive properties of Ni and Ni/Co-based layers as well as the performances of the sensors in the range −20 to 120 °C.
AB - A new thick film material has been developed starting from Ni and Co powders in the ratio Ni:Co = 3:1. The thermal treatment (in N2, up to 950 °C) of the metal films deposited on glazed alumina enables the in situ formation of the NiCo alloy. The films as created exhibit a high longitudinal (current I parallel to the field B) magnetoresistive response with ΔR/R ≈4% at 1.2 kGauss, and a negligible transverse one. The temperature coefficient of resistance (TCR) is ≈2700 ppm °C−1. These properties make the new material superior, from the point of view of magnetoresistive applications, to the Ni-based currently available thick film conductors. Contactless sensors for linear displacements have been created with the sensor's structure enclosing either Ni-based and Ni/Co-based meanders, having two magnetoresistive elements on each side of the substrate. This paper compares the magnetoresistive and thermoresistive properties of Ni and Ni/Co-based layers as well as the performances of the sensors in the range −20 to 120 °C.
KW - Displacement sensors
KW - Magnetoresistive sensors
KW - Thick film sensors
UR - http://www.scopus.com/inward/record.url?scp=0029224955&partnerID=8YFLogxK
U2 - 10.1016/0924-4247(94)00902-T
DO - 10.1016/0924-4247(94)00902-T
M3 - Article
SN - 0924-4247
VL - 46
SP - 261
EP - 265
JO - Sensors and Actuators A: Physical
JF - Sensors and Actuators A: Physical
IS - 1-3
ER -