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Magnetic Ordering-Induced Multiferroic Behavior in [CH3NH3][Co(HCOO)3] Metal-Organic Framework.

L Claudia Gómez-Aguirre1, Breogán Pato-Doldán1, J Mira2

  • 1Department of Fundamental Chemistry, Faculty of Sciences, University of A Coruña , 15071 A Coruña, Spain.

Journal of the American Chemical Society
|December 31, 2015
PubMed
Summary
This summary is machine-generated.

We discovered multiferroic behavior in a metal-organic framework magnet. This spin canted antiferromagnet exhibits coupled magnetic and electric properties, showing memory effects under magnetic fields.

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Area of Science:

  • Materials Science
  • Solid State Physics
  • Chemistry

Background:

  • Metal-organic frameworks (MOFs) offer tunable structures for novel properties.
  • Multiferroic materials exhibit coupled magnetic and electric ordering.
  • Investigating MOFs for multiferroic behavior is an emerging research area.

Purpose of the Study:

  • To report the first instance of magnetic ordering-induced multiferroic behavior in a MOF.
  • To characterize the magnetic and electric properties of [CH3NH3][Co(HCOO)3].
  • To elucidate the mechanism behind the observed multiferroic coupling.

Main Methods:

  • Synthesis and structural analysis of the [CH3NH3][Co(HCOO)3] compound.
  • Magnetic susceptibility and magnetization measurements.
  • Electric polarization measurements under applied magnetic fields.

Main Results:

  • The compound [CH3NH3][Co(HCOO)3] exhibits multiferroic behavior below 15.9 K.
  • Magnetic ordering is spin canted antiferromagnetic with a weak ferromagnetic component due to Dzyaloshinskii-Moriya (DM) interactions.
  • Coupled magnetic and electric switching observed along specific crystallographic directions, with an unusual electric polarization memory effect.

Conclusions:

  • The metal-organic framework [CH3NH3][Co(HCOO)3] is a novel multiferroic material.
  • The observed multiferroic behavior is attributed to an inverse-DM mechanism.
  • The findings open new avenues for MOF-based multiferroic applications.