Reduced thermal dependence of the sensitivity of a planar Hall sensor

Mohamed Mahfoud; Quang-Hung Tran; Sidina Wane; Duc-The Ngo; El Habib Belarbi; Abdelaziz Boukra; Mijin Kim; Amir Elzwawy; Cheolgi Kim; Guenter Reiss; Bernard Diény; Azzedine Bousseksou; Ferial Terki

doi:10.1063/1.5110671

Article dans une revue

Reduced thermal dependence of the sensitivity of a planar Hall sensor

Mohamed Mahfoud ^{1, 2} Quang-Hung Tran ³ Sidina Wane Duc-The Ngo ⁴ El Habib Belarbi ² Abdelaziz Boukra ⁵ Mijin Kim ⁶ Amir Elzwawy ⁶ Cheolgi Kim ⁶ Guenter Reiss ⁷ Bernard Diény ⁸ Azzedine Bousseksou ⁹ Ferial Terki ^{3, 1}

1 ICGM ICMMM - Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier

2 LSCT - Laboratoire Synthèse et Catalyse [Tiaret]

3 PEPS - Physique de l'Exciton, du Photon et du Spin

L2C - Laboratoire Charles Coulomb

4 University of Manchester [Manchester]

5 SEA2M - Laboratoire de Structure et Application des Matériaux Moléculaires

6 DGIST - Daegu Gyeongbuk Institute of Science and Technology

7 Technische Fakultät, Universität Bielefeld

8 SPINTEC - SPINtronique et TEchnologie des Composants

9 LCC - Laboratoire de chimie de coordination

Abstract : 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 (10/0.12/10 nm). The high thermal stability of the sensor sensitivity of 4.5 ± 0.15 × 10−3 V/A/T/K is achieved when the external magnetic field is set around ±2 ± 0.04 mT and the applied current is fixed at 20 mA in the temperature range of 110 K–360 K. 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.

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Chimie

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https://hal.umontpellier.fr/hal-02283659
Contributeur : Odile Hennaut <>
Soumis le : mercredi 11 septembre 2019 - 09:10:08
Dernière modification le : mercredi 1 avril 2020 - 15:22:24

Reduced thermal dependence of the sensitivity of a planar Hall sensor

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