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Temperature-tuned ferromagnetism in hydrogenated multilayer graphene
Man Zhao1,2, He Xiao1,2, Shuai Chen3
1Key Laboratory of Magnetic Molecules & Magnetic Information Materials Ministry of Education, Shanxi Normal University Linfen China 041004 xiaohe200808@sxnu.edu.cn jiajf@dns.sxnu.edu.cn.
RSC Advances
|May 11, 2022
Summary
Hydrogenating graphene creates ferromagnetism, crucial for spintronics. Annealing hydrogenated graphene tunes this magnetism by altering hydrogen atom bonding.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Nanotechnology
Background:
- Improving ferromagnetism in carbon-based materials is vital for spintronics applications.
- Hydrogenation of graphene offers a reversible method to induce magnetic moments.
- Existing studies are limited by oxygen contamination or plasma-induced defects, obscuring magnetic origins.
Purpose of the Study:
- To investigate hydrogen-induced ferromagnetism in multilayer graphene.
- To explore the effect of thermal treatment on the magnetic properties of hydrogenated graphene.
- To establish a facile method for creating magnetic graphene.
Main Methods:
- Electrochemical cathodic method for hydrogenating graphite powder into multilayer graphene/few-layer graphite.
- Annealing hydrogenated samples at various temperatures.
- Characterization of magnetic properties and hydrogen adsorption.
Main Results:
- Successfully generated hydrogenated multilayer graphene/few-layer graphite.
- Observed hydrogen-induced ferromagnetism in the prepared samples.
- Demonstrated that ferromagnetism can be tuned by annealing temperature.
Conclusions:
- Facile electrochemical hydrogenation induces ferromagnetism in graphene-based materials.
- Thermal treatment plays a key role in tuning the magnetic properties.
- The observed tunable ferromagnetism is attributed to changes in chemisorbed hydrogen on different graphene sublattices.
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