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Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
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Temperature dependence of spin transport behavior in Heusler alloy CPP-GMR
Nattaya Saenphum1,2, Rungtawan Khamtawi1, Jessada Chureemart1
1Department of Physics, Mahasarakham University, Mahasarakham, 44150, Thailand.
Scientific Reports
|October 13, 2024
Summary
Increasing temperature degrades read sensor performance by reducing spin transport and magnetic properties. This study reveals critical temperature effects on magnetoresistance (MR) ratios, decreasing from 65% to 20% between 0 and 400 K.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Spintronics
Background:
- Read sensors are crucial for data storage devices.
- Understanding temperature effects on sensor performance is vital for reliable operation.
- Spintronic devices utilize electron spin for enhanced functionality.
Purpose of the Study:
- To investigate the impact of temperature on read sensor performance.
- To analyze temperature-dependent spin transport and magnetoresistance (MR) in a specific trilayer structure.
- To provide insights for optimizing read sensor design.
Main Methods:
- Utilized an atomistic model coupled with a spin transport model.
- Employed a two-channel model of spin-dependent resistivity.
- Calculated temperature dependence of spin transport parameters and spin accumulation.
Main Results:
- Spin transport parameters and magnetic properties decrease with increasing temperature due to thermal fluctuations.
- Zero spin polarization observed at the critical temperature where ferromagnetism is lost.
- Spin accumulation deviates from equilibrium at elevated temperatures, reducing spin current and transport parameters.
- Magnetoresistance (MR) ratio decreases from 65% to 20% as temperature increases from 0 K to 400 K.
Conclusions:
- Thermal fluctuations significantly impact read sensor performance.
- The study elucidates the physical mechanisms governing reader stack behavior under varying temperatures.
- Findings can guide the design of more robust and efficient read sensors.
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