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Related Experiment Video

Updated: Oct 19, 2025

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
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Generic Seebeck effect from spin entropy.

Peijie Sun1,2,3, K Ramesh Kumar1, Meng Lyu1,2

  • 1Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.

Innovation (Cambridge (Mass.))
|September 24, 2021
PubMed
Summary
This summary is machine-generated.

Magnetism influences the Seebeck effect through a generic spin contribution in magnetic compounds. This spin-dependent Seebeck effect, arising from spin entropy, offers a new path for efficient magnetic thermoelectrics.

Keywords:
Seebeck effectmagnetocaloric effectspin entropythermoelectric material

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Area of Science:

  • Condensed matter physics
  • Materials science
  • Thermodynamics

Background:

  • The relationship between magnetism and the Seebeck effect is a key area of research in thermoelectrics.
  • Existing understanding of this interplay remains incomplete.

Purpose of the Study:

  • To investigate the fundamental mechanisms by which magnetism influences the Seebeck effect.
  • To identify a generic spin contribution to the Seebeck effect in magnetic materials.

Main Methods:

  • Thermodynamic analysis of spin degrees of freedom in d-electron-based ferromagnets and antiferromagnets.
  • Examination of itinerant and partially itinerant magnetic compounds.

Main Results:

  • A generic spin contribution to the Seebeck effect was demonstrated in itinerant magnetic compounds.
  • This effect is present over a wide temperature range, including above the magnetic transition temperature.
  • The contribution originates from the transport spin entropy of delocalized d electrons with thermal spin fluctuations.

Conclusions:

  • The spin-dependent Seebeck effect is a generic phenomenon in magnetic materials.
  • This finding provides a theoretical basis for developing efficient magnetic thermoelectric materials.