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

L. C. Gómez-Aguirre | Zendy; Breogán PatoDoldán | Zendy; J. Mira | Zendy; Socorro CastroGarcía | Zendy; M. A. SeñarísRodríguez | Zendy; Manuel SánchezAndújar | Zendy; John Singleton | Zendy; Vivien S. Zapf | Zendy

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

Author(s) -

L. C. Gómez-Aguirre,

Breogán PatoDoldán,

J. Mira,

Socorro CastroGarcía,

M. A. SeñarísRodríguez,

Manuel SánchezAndújar,

John Singleton,

Vivien S. Zapf

Publication year - 2015

Publication title -

journal of the american chemical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 7.115

H-Index - 612

eISSN - 1520-5126

pISSN - 0002-7863

DOI - 10.1021/jacs.5b11688

Subject(s) - multiferroics , condensed matter physics , chemistry , antiferromagnetism , electric field , ferromagnetism , polarization density , polarization (electrochemistry) , magnetic anisotropy , anisotropy , magnetic field , hysteresis , inverse , ferroelectricity , nuclear magnetic resonance , magnetization , physics , dielectric , optics , optoelectronics , quantum mechanics , geometry , mathematics

We present the first example of magnetic ordering-induced multiferroic behavior in a metal-organic framework magnet. This compound is [CH3NH3][Co(HCOO)3] with a perovskite-like structure. The A-site [CH3NH3](+) cation strongly distorts the framework, allowing anisotropic magnetic and electric behavior and coupling between them to occur. This material is a spin canted antiferromagnet below 15.9 K with a weak ferromagnetic component attributable to Dzyaloshinskii-Moriya (DM) interactions and experiences a discontinuous hysteretic magnetic-field-induced switching along [010] and a more continuous hysteresis along [101]. Coupling between the magnetic and electric order is resolved when the field is applied along this [101]: a spin rearrangement occurs at a critical magnetic field in the ac plane that induces a change in the electric polarization along [101] and [10-1]. The electric polarization exhibits an unusual memory effect, as it remembers the direction of the previous two magnetic-field pulses applied. The data are consistent with an inverse-DM mechanism for multiferroic behavior.

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