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Related Concept Videos

The Hall Effect01:30

The Hall Effect

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Edwin H. Hall, in the year 1879, devised an experiment that could be used to identify the polarity of the predominant charge carriers in a conducting material. From a historical perspective, this experiment was the first to demonstrate that the charge carriers in most metals are negative.
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Related Experiment Video

Updated: Mar 17, 2026

Growth and Electrostatic/chemical Properties of Metal/LaAlO3/SrTiO3 Heterostructures
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Interface-driven topological Hall effect in SrRuO3-SrIrO3 bilayer.

Jobu Matsuno1, Naoki Ogawa1, Kenji Yasuda2

  • 1RIKEN Center for Emergent Matter Science (CEMS), Saitama 351-0198, Japan.

Science Advances
|July 16, 2016
PubMed
Summary
This summary is machine-generated.

We observed the topological Hall effect (THE) in epitaxial oxide interfaces, revealing its strong connection to interface Dzyaloshinskii-Moriya (DM) interactions. This finding advances the understanding of magnetic skyrmions and topological electronics.

Keywords:
Spin-orbit interactionberry phasebroken inversion symmetrydzyaloshinskii-Moriya interactionmagnetic skyrmionspintronicstopological Hall effect

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Spintronics

Background:

  • Electron transport coupled with magnetism is a key area of research.
  • Topological Hall effect (THE) originates from scalar spin chirality and probes Dzyaloshinskii-Moriya (DM) interactions.
  • DM interactions, arising from broken inversion symmetry, can be engineered at interfaces.

Purpose of the Study:

  • To investigate the coupling between transport properties and interface DM interaction.
  • To explore the potential of epitaxial oxide interfaces for studying DM interactions and topological phenomena.
  • To clarify the role of interface engineering in controlling magnetic properties.

Main Methods:

  • Fabrication of epitaxial bilayers using ferromagnetic SrRuO3 and paramagnetic SrIrO3.
  • Measurement of THE over a wide range of temperatures and magnetic fields.
  • Analysis of THE dependence on the thickness of the SrRuO3 layer.

Main Results:

  • Observation of THE in SrRuO3/SrIrO3 epitaxial bilayers.
  • Significant decrease in THE magnitude with increasing SrRuO3 thickness, indicating a strong interface effect.
  • Evidence for interface DM interaction playing a crucial role in the observed phenomena.
  • Potential to realize 10-nm-sized Néel-type magnetic skyrmions.

Conclusions:

  • High-quality oxide interfaces enable tuning of effective DM interaction.
  • The study establishes a link between interface engineering and topological transport phenomena.
  • This work is a step towards the development of future topological electronics.