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Inducing ferromagnetism and Kondo effect in platinum by paramagnetic ionic gating
Lei Liang1, Qihong Chen1, Jianming Lu1
1Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, Netherlands.
Science Advances
|May 10, 2018
Summary
Researchers demonstrate reversible electrical switching of ferromagnetic states in platinum films using paramagnetic ionic liquids. This novel approach induces magnetism and exhibits unique transport phenomena, paving the way for advanced spintronic devices.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Spintronics
Background:
- Electrically controllable magnetism is crucial for spintronics, requiring manipulation of both charge and spin.
- Existing methods for electrical control of magnetism are continuously being explored.
Purpose of the Study:
- To report the reversible electrical switching of ferromagnetic states in platinum (Pt) thin films.
- To investigate the use of paramagnetic ionic liquid (PIL) as a gating medium for inducing and controlling magnetism.
Main Methods:
- Utilizing paramagnetic ionic liquid (PIL) as a gating medium for platinum (Pt) thin films.
- Investigating the induced ferromagnetic (FM) states through electrical transport measurements.
- Analyzing the magnetic properties, including coercivity and anisotropy.
Main Results:
- Achieved reversible electrical switching of FM states in Pt thin films.
- Paramagnetic ionic gating induced itinerant ferromagnetism with large coercivity and perpendicular anisotropy.
- Observed Kondo effect in the induced FM state, indicating coexistence of Kondo scattering and ferromagnetism.
Conclusions:
- Paramagnetic ionic gating is a versatile method for inducing tunable ferromagnetic states.
- This technique enables the combination of field effects and magnetism at interfaces.
- The findings suggest potential for developing novel spintronic devices and exploring complex transport phenomena.
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