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Related Experiment Videos

XAS and MCD studies in Eu0.6Sr0.4MnO3.

M Mizumaki1, Y Saitoh, A Agui

  • 1Japan Synchrotron Radiation Research Institute, Sayoh-gun, Japan. mizumaki@spring8.or.jp

Journal of Synchrotron Radiation
|August 22, 2001
PubMed
Summary

Eu(1-x)Sr(x)MnO3 exhibits a unique insulator-metal transition. X-ray Magnetic Circular Dichroism revealed the mechanism behind this field-induced transition in ferromagnetic semiconductor Eu(0.6)Sr(0.4)MnO3.

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Magnetism

Background:

  • Perovskite manganites are known for giant magnetoresistance and insulator-to-metal transitions.
  • The Eu(1-x)Sr(x)MnO3 system displays unique properties within this class.
  • Eu(0.6)Sr(0.4)MnO3 is a ferromagnetic semiconductor exhibiting field-induced insulator-metal transition.

Purpose of the Study:

  • To investigate the mechanism of the insulator-metal (IM) transition in Eu(0.6)Sr(0.4)MnO3.
  • To understand the role of electronic and magnetic interactions in this transition.

Main Methods:

  • X-ray Magnetic Circular Dichroism (XMCD) spectroscopy was employed.
  • XMCD measurements were performed at the Mn L2,3-edges and Eu M4,5-edges.

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Main Results:

  • The study provides insights into the electronic and magnetic states driving the IM transition.
  • Specific contributions of Mn and Eu elements to the transition mechanism were elucidated.

Conclusions:

  • The findings clarify the unique IM transition behavior in Eu(0.6)Sr(0.4)MnO3.
  • This research contributes to the understanding of phase transitions in perovskite manganites.