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Related Experiment Videos

Hexagonal YMnO(3).

B B van Aken1, A Meetsma, T T Palstra

  • 1Inorganic Solid State Chemistry Laboratory, Materials Science Center, Groningen University, Nijenborgh 4, NL-9747 AG Groningen, The Netherlands.

Acta Crystallographica. Section C, Crystal Structure Communications
|March 16, 2001
PubMed
Summary
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The crystal structure of hexagonal yttrium trioxomanganate was determined at room temperature and 180 K. Despite a ferroelectric component, net ferroelectricity is zero due to inversion twinning.

Area of Science:

  • Crystallography
  • Materials Science
  • Solid State Physics

Background:

  • Hexagonal yttrium trioxomanganate (YMnO3) is a key material in multiferroics research.
  • Understanding its crystal structure is crucial for its magnetic and ferroelectric properties.

Purpose of the Study:

  • Determine the crystal structure of hexagonal YMnO3 at room temperature and 180 K.
  • Investigate the Mn displacement vector and its relation to ferroelectricity.

Main Methods:

  • Single-crystal X-ray diffraction.
  • Analysis of crystal structure and twinning fractions.

Main Results:

  • The crystal structure is hexagonal and isomorphous with LuMnO3.
  • The Mn displacement vector exhibits a frustrated component in the ab plane and a ferroelectric component along the c axis.

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  • Net ferroelectricity is zero due to 1:1 inversion twinning.

    • Conclusions:

    • The determined crystal structure explains the absence of net ferroelectricity in hexagonal YMnO3.
    • Inversion twinning plays a critical role in the material's properties.
    • Further research can explore modifications to overcome twinning for potential applications.