Magnetic Field Sensor Based on Magnetic Tunnel Junction with Voltage-Tunable Magnetic Anisotropy

• Authors: W. Skowroński , P. Wiśniowski , J. Wrona , A. Żywczak , T. Stobiecki
• Languages of publication: EN

Abstracts

EN

We present a submicron magnetic field sensor with voltage-tunable magnetic field sensitivity. The device, based on magnetic tunnel junction, exhibits high tunnelling magnetoresistance ratio of up to 90%. Perpendicular magnetic anisotropy of thin ferromagnetic sensing layer in combination with an in-plane magnetized reference layer is used to obtain linear change in the sensor resistance in response to the in-plane magnetic field. The perpendicular anisotropy is further controlled by the bias voltage and, thus, the sensitivity of the sensor is changed. In addition, we evaluate the sensor selectivity for the magnetic field direction and present an influence of the temperature on the anisotropy.

Keywords

EN

85.75.-d; 85.75.Ss; 85.35.-p

Discipline

• 85.35.-p: Nanoelectronic devices
• 85.75.Ss: Magnetic field sensors using spin polarized transport
• 85.75.-d: Magnetoelectronics; spintronics: devices exploiting spin polarized transport or integrated magnetic fields

• Journal: Acta Physica Polonica A
• Year: 2015
• Volume: 127
• Issue: 2
• Pages: 496-498

Dates

published

2015-02

Contributors

author

W. Skowroński

• AGH University of Science and Technology, Department of Electronics, al. Mickiewicza 30, 30-059 Kraków, Poland

author

P. Wiśniowski

• AGH University of Science and Technology, Department of Electronics, al. Mickiewicza 30, 30-059 Kraków, Poland

author

J. Wrona

• AGH University of Science and Technology, Department of Electronics, al. Mickiewicza 30, 30-059 Kraków, Poland
• Singulus Technologies, Kahl am Main, 63796, Germany

author

A. Żywczak

• AGH University of Science and Technology, Academic Center for Materials and Nanotechnology, al. Mickiewicza 30, 30-059 Kraków, Poland

author

T. Stobiecki

• AGH University of Science and Technology, Department of Electronics, al. Mickiewicza 30, 30-059 Kraków, Poland

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Identifiers

DOI

10.12693/APhysPolA.127.496