Reduced thermal dependence of the sensitivity of a planar Hall sensor

Mahfoud M, Quang-Hung Tran Q-HT, Wane S, Duc-The Ngo D-TN, Belarbi EH, Boukra AA, Kim M, Elzwawy A, Kim CG, Reiss G, Dieny B, et al. (2019)
Applied Physics Letters 115(7): 072402.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Abstract / Bemerkung
The ability to stabilize the sensitivity of a magnetoresistance sensor in unstable thermal environments is a key parameter in many high precision measurements. Here, we propose a method to stabilize the sensitivity of a highly sensitive and low noise magnetic sensor based on a planar Hall Effect crossed junction. The stability is achieved by controlling the interplay between Zeeman energy, exchange bias energy, and anisotropy energy as a function of the temperature of the sensor stack comprising a trilayer structure NiFe/Cu/IrMn (10/0.12/10nm). The high thermal stability of the sensor sensitivity of 4.5 +/- 0.15x10(-3) V/A/T/K is achieved when the external magnetic field is set around +/- 2 +/- 0.04mT and the applied current is fixed at 20mA in the temperature range of 110K-360K. This method improves the magnetic sensor detection by about an order of magnitude, enabling its deployment in various research fields, particularly to study magnetic properties of small quantities of magnetic materials toward the detection of single magnetic objects, which was impossible before.
Erscheinungsjahr
2019
Zeitschriftentitel
Applied Physics Letters
Band
115
Ausgabe
7
Art.-Nr.
072402
ISSN
0003-6951
eISSN
1077-3118
Page URI
https://pub.uni-bielefeld.de/record/2937107

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Mahfoud M, Quang-Hung Tran Q-HT, Wane S, et al. Reduced thermal dependence of the sensitivity of a planar Hall sensor. Applied Physics Letters. 2019;115(7): 072402.
Mahfoud, M., Quang-Hung Tran, Q. - H. T., Wane, S., Duc-The Ngo, D. - T. N., Belarbi, E. H., Boukra, A. A., Kim, M., et al. (2019). Reduced thermal dependence of the sensitivity of a planar Hall sensor. Applied Physics Letters, 115(7), 072402. doi:10.1063/1.5110671
Mahfoud, M., Quang-Hung Tran, Q. - H. T., Wane, S., Duc-The Ngo, D. - T. N., Belarbi, E. H., Boukra, A. A., Kim, M., Elzwawy, A., Kim, C. G., Reiss, G., et al. (2019). Reduced thermal dependence of the sensitivity of a planar Hall sensor. Applied Physics Letters 115:072402.
Mahfoud, M., et al., 2019. Reduced thermal dependence of the sensitivity of a planar Hall sensor. Applied Physics Letters, 115(7): 072402.
M. Mahfoud, et al., “Reduced thermal dependence of the sensitivity of a planar Hall sensor”, Applied Physics Letters, vol. 115, 2019, : 072402.
Mahfoud, M., Quang-Hung Tran, Q.-H.T., Wane, S., Duc-The Ngo, D.-T.N., Belarbi, E.H., Boukra, A.A., Kim, M., Elzwawy, A., Kim, C.G., Reiss, G., Dieny, B., Bousseksou, A., Terki, F.: Reduced thermal dependence of the sensitivity of a planar Hall sensor. Applied Physics Letters. 115, : 072402 (2019).
Mahfoud, Mohamed, Quang-Hung Tran, Quang-Hung Tran, Wane, Sidina, Duc-The Ngo, Duc-The Ngo, Belarbi, El Habib, Boukra, AbdelAziz, Kim, Mijin, Elzwawy, Amir, Kim, CheolGi, Reiss, Günter, Dieny, Bernard, Bousseksou, Azzedine, and Terki, Feria. “Reduced thermal dependence of the sensitivity of a planar Hall sensor”. Applied Physics Letters 115.7 (2019): 072402.