Magnetoresistive detection of spin waves
Data files
Aug 05, 2025 version files 307.31 KB
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FL_response_fct.txt
191.70 KB
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fres_vs_H.txt
241 B
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group_velocity.txt
352 B
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Inductive_20mT_1p5mA.txt
18.75 KB
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kalinikos_Py.txt
13.66 KB
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MR_20mT_1p5mA.txt
18.66 KB
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MR_vs_field_20mT.txt
7.57 KB
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MR_vs_field_40mT.txt
12.35 KB
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MR_vs_field_60mT.txt
12.38 KB
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pIDC_mIDC_20mT_1p5mA.txt
13.25 KB
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README.md
4.74 KB
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theoretical_group_velocity.txt
13.65 KB
Abstract
We explore a detection method for spin-waves that consists of integrating a magneto-resistive sensor on a magnonic waveguide. When subjected to the stray magnetic field generated by the spin-wave, the relative orientation of the magnetizations of the two magnetic layers in the sensor oscillates in time, resulting in an electrical resistance change according to the so-called giant magneto-resistance effect. Upon application of an appropriate current bias, this variation of resistance translates into a sizable microwave voltage. At the sub-micrometer scale explored here, this signal is about fifty times larger than the one extracted from conventional inductive measurements of spin-waves for comparable detection areas. Moreover, such a detection scheme is expected to scale very favorably down to the nanometer size relevant for future magnon-based data processing architectures.
Dataset DOI: 10.5061/dryad.zw3r228kj
Description of the data and file structure
This dataset contains all the data exposed in the manuscript.
Files and variables
File: Inductive_20mT_1p5mA.txt
Description: Fig. 2A. Corresponds to the inductive contribution in the total signal shown in Fig. 1C (pIDC_mIDC_20mT_1p5mA.txt)
Variables
- Frequency: Microwave frequency applied in the exciting antenna (GHz)
- Re(SigmaZ21): Blue (dashed), real part of the inductive contribution (mohms)
- Im(SigmaZ21): Red, imaginary part of the inductive contribution (mohms)
- Mag(SigmaZ21): Black (dotted), modulus of the inductive contribution (mohms)
File: kalinikos_Py.txt
Description: Fig. 2D blue curve. Theoretical resonance frequency of the spin-wave in the Permalloy (Py) waveguide vs applied field (Kalinikos and Slavin model)
Variables
- Field: Magnitude of the applied field (mT)
- Frequency: Theoretical resonance frequency vs field (GHz)
File: MR_20mT_1p5mA.txt
Description: Fig. 2B. Corresponds to the magnetoresistive (MR) contribution in the total mutual impedance DeltaZ21 shown in Fig. 1C (pIDC_mIDC_20mT_1p5mA.txt)
Variables
- Frequency: Microwave frequency applied in the exciting antenna (GHz)
- Re(DeltaZ21): Blue (dashed), real part of the magnetoresistive contribution (mohms)
- Im(DeltaZ21): Red, imaginary part of the magnetoresistive contribution (mohms)
- Mag(DeltaZ21): Black (dotted), complex modulus of the magnetoresistive contribution (mohms)
File: MR_vs_field_20mT.txt
Description: Fig. 2C, real part of the magnetoresistive (MR) contribution for an external field of magnitude 20 mT
Variables
- Frequency: Microwave frequency applied in the exciting antenna (GHz)
- Smoothed Y1: Blue (dashed), real part of the magnetoresistive contribution for an external field of magnitude 20 mT (mohms)
File: MR_vs_field_40mT.txt
Description: Fig. 2C, real part of the magnetoresistive (MR) contribution for an external field of magnitude 40 mT
Variables
- Frequency: Microwave frequency applied in the exciting antenna (GHz)
- Smoothed Y1: Light magenta, real part of the magnetoresistive contribution for an external field of magnitude 40 mT (mohms)
File: MR_vs_field_60mT.txt
Description: Fig. 2C, real part of the magnetoresistive (MR) contribution for an external field of magnitude 60 mT
Variables
- Frequency: Microwave frequency applied in the exciting antenna (GHz)
- Smoothed Y1: Black dotted, real part of the magnetoresistive contribution for an external field of magnitude 20 mT (mohms)
File: pIDC_mIDC_20mT_1p5mA.txt
Description: Fig. 1C. Total mutual impedance (DeltaZ21) signal measured for an applied field of 20 mT, a DC bias of +/- I_DC = 1.5 mA in the GMR device.
Variables
- Frequency: Microwave frequency applied in the exciting antenna
- Re(DeltaZ21): real part of the total signal for a DC bias of I_DC=1.5mA (in mohms)
- Re(DeltaZ21m): real part of the total signal for a DC bias of I_DC=-1.5mA (in mohms)
File: theoretical_group_velocity.txt
Description: Fig. 2D. Theoretical group velocity of the spin wave calculated from the Kalinikos and Slavin model.
Variables
- Field: Magnitude of the applied field (mT)
- vg: Red curve, theoretical group velocity calculated from the dispersion relation (km/s).
File: fres_vs_H.txt
Description: Fig. 2D. Data representing the resonance frequency (fres) of the magnetoresistive signal as a function of the applied field µ0H0.
Variables
- Field: Magnitude of the applied field (mT)
- fres: Squares, experimental resonance frequency of the magnetoresistive signal (GHz)
- err_fres: error bars on fres
File: group_velocity.txt
Description: Fig. 2D. Experimentally measured group velocity of the spin wave.
Variables
- Field: Magnitude of the applied field (mT)
- vg: Circles, experimental group velocity as a function of the aappliedfield (km/s)
- err_vg: error bars on vg
File: FL_response_fct.txt
Description: Fig. 3B. Simulated response function of the free layer (FL) from an excitation provided by the microwave antenna.
Variables
- Frequency: Frequency of the oscillating field of the antenna (GHz)
- Re(Xxx_FL): real part of the simulated free layer response function (arbitrary units)
- Im(Xxx_FL): imaginary part of the simulated free layer response function (arbitrary units)
- Mod(Xxx_FL): modulus of the simulated free layer response function (arbitrary units)
Code/software
Data can be plotted using Python with packages Pandas and matplotlib