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Published on: June 28, 2018
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Longitudinal spin Seebeck effect: from fundamentals to applications
Summary
The spin Seebeck effect generates spin voltage from heat in magnetic materials. This phenomenon, particularly the longitudinal spin Seebeck effect (LSSE), is crucial for spintronics and thermoelectric applications.
Area of Science:
- Condensed matter physics
- Spintronics
- Thermoelectricity
Background:
- The spin Seebeck effect generates spin voltage from temperature gradients in magnetic materials.
- It enables direct spin current generation from heat, applicable to various magnets.
- Recent research focuses on the longitudinal spin Seebeck effect (LSSE) in metal/insulator junctions.
Purpose of the Study:
- To review fundamental experiments on the longitudinal spin Seebeck effect (LSSE).
- To discuss the potential of LSSE in thermoelectric energy generation.
- To present demonstrations of LSSE-based thermoelectric applications.
Main Methods:
- Experimental investigation of spin voltage generation under temperature gradients.
- Measurement of spin current injection from magnets to conductors.
- Separation of spin-current contributions from thermoelectric and magnetic proximity effects.
Main Results:
- The longitudinal spin Seebeck effect (LSSE) has been observed in diverse magnetic systems.
- LSSE is established by distinguishing spin-current effects from extrinsic artifacts.
- LSSE in insulators, combined with inverse spin-Hall effects, offers a pathway to thermoelectric generation.
Conclusions:
- The spin Seebeck effect is a key phenomenon in spintronics for heat-to-spin conversion.
- LSSE is a validated effect with significant potential for thermoelectric devices.
- Further research into LSSE could lead to novel thermoelectric applications.
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