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Spin caloritronics in metallic superlattices.

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Spin caloritronics explores converting heat to electricity using spin currents. Enhancing the anomalous Nernst effect (ANE) via superlattices is key for efficient thermoelectric devices.

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Area of Science:

  • Spin caloritronics
  • Condensed matter physics
  • Materials science

Background:

  • Spin caloritronics investigates the interplay between charge, spin, and heat currents.
  • The anomalous Nernst effect (ANE) offers transverse thermoelectric conversion, distinct from conventional Seebeck effect.
  • Improving conversion efficiency is crucial for practical applications.

Purpose of the Study:

  • To review the field of spin caloritronics.
  • To highlight the role of superlattices in enhancing thermoelectric conversion.
  • To discuss advancements in materials for spin-caloritronic devices.

Main Methods:

  • Survey of existing research in spin caloritronics.
  • Focus on superlattice structures for thermoelectric applications.
  • Analysis of Fe-, Ni-, and ordered alloy-based metallic superlattices.

Main Results:

  • Superlattice structures demonstrate increased anomalous Nernst coefficient (SANE).
  • Pioneering work in Fe-based metallic superlattices.
  • Recent progress in Ni-based and ordered alloy-based superlattices.

Conclusions:

  • Superlattices are a promising approach to enhance SANE for efficient thermoelectric conversion.
  • Continued research in materials and device design is needed for practical spin-caloritronic applications.