Master's thesis

Optical Study of Itinerant Ferromagnet, SrRuO3

Ferromagnetism,Transition metal oxide, Infrared Spectroscopy

Investigate the conducting mechanism and its relation to magnetic ordering in ruthenate thin film!

  • Transition metal oxide is promising material for next-gen devices applications
  • Perovskite SrRuO3 is itinerant ferromagnet
  • Poly-oriented SrRuO3 show anomaly in resistivity below ferromagnetic ordering
  • Via infrared spectroscopy, investigate the physics behind the anomaly by examining the electronic state

Multi-valent nature in transition metal oxide triggers abundant promising electronic properties, such as superconductivity, and ferroelectricity. Among these systems, SrRuO3 has been under great attention as an itinerant ferromagnet. In this project, we will investigate the relation between the ferromagnetic transition and the electronic conduction in thin film SrRuO3 grown on different orientations. An anomaly has been observed in polycrystalline SRO thin film as its resistivity goes below than that of single-crystalline film at low temperature showing non-Fermi liquid behavior. This is unexpected phenomena, since the grain boundaries in poly sample supposed to scatter the electrons, resulting in higher resistivity. Employing infrared spectroscopy, we will reveal the electronic state which will give us insight of the mechanism of this abnormal conduction in poly-oriented oxide.

Seulki  Roh
Dr.

Seulki Roh

Infrared spectroscopy

Martin Dressel
Prof. Dr. rer. nat.

Martin Dressel

Head of Institute

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