High-sensitive magnetic field transducer based on spin-tunnel magnetoresistive nanostructures with synthetic antiferromagnet

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Abstract

The results of a study of mock-ups of magnetic field transducers (MFT) based on spin-tunnel magnetoresistive nanostructures (STMR) with a synthetic antiferromagnet (SAF) are presented. The absolute sensitivity to the magnetic field of the studied MFT-SAF mock-ups was 217 mV/Oe in the magnetic field range ±5 Oe (±0.5 mT) at a supply voltage of 5 V.

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About the authors

D. V. Vasilyev

Scientific-manufacturing complex "Technological centre"

Email: V.Amelichev@tcen.ru
ORCID iD: 0000-0001-6568-5301

Head of Laboratory

Russian Federation, Moscow

A. N. Saurov

Institute of Nanotechnology of Microelectronics of the Russian Academy of Sciences

Email: V.Amelichev@tcen.ru

Doct. of Sci. (Tech), Prof., Academician of RAS, Director

Russian Federation, Moscow

V. V. Amelichev

Scientific-manufacturing complex "Technological centre"

Author for correspondence.
Email: V.Amelichev@tcen.ru
ORCID iD: 0000-0002-4204-2626

Cand. of Sci. (Tech), Head of Department

Russian Federation, Moscow

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  14. Электронный ресурс: Материалы сайта компании "MultiDimension Technology Co., Ltd". www.dowaytech.com (Дата обращения: 30.10.2024).

Supplementary files

Supplementary Files
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2. Fig.1. STMR sketch of a nanostructure with SAF Ta / CoFe / CoFeB / MgO / CoFeB / Ru / CoFe / IrMn / Ta (a) and its remagnetisation loop (b)

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3. Fig.2. The full Wheatstone bridge circuit (a) based on MTJ has zero signal at the output in the absence of an external magnetic field, an external magnetic field (b) unbalances the bridge circuit, and a signal appears at the output [9]

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4. Fig.3. Sequence of connected MTJs

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5. Fig.4. Dependence of R(H) of a chain of series-connected MTJs on the external magnetic field, dR/R = 45%

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6. Fig.5. Dependence of R(H) of a chain of series-connected MTJs on the external magnetic field after the first stage of magnetic annealing (blue curve) and after the second stage (red curve)

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7. Fig.6. Photograph of the MFJs-SAF mock-up

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8. Fig.7. Volt-Oersted characteristics of mock-up samples with a 1.0 mm (blue curve) and 0.35 mm (red curve) MFCs gap

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9. Fig.8. Dependence of absolute sensitivity to magnetic field of the MFTs-SAF mock-up on the supply voltage

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Copyright (c) 2025 Vasilyev D.V., Saurov A.N., Amelichev V.V.