title: Cross coupling between electric and magnetic orders in a multiferroic metal-organic framework.
abstract: The coexistence of both electric and magnetic orders in some metal-organic frameworks (MOFs) has yielded a new class of multiferroics beyond inorganic materials. However, the coupling between two orders in multiferroic MOFs has not been convincingly verified yet. Here we present clear experimental evidences of cross coupling between electric and magnetic orders in a multiferroic MOF [(CH3)2NH2]Fe(HCOO)3 with a perovskite structure. The dielelectric constant exhibit a hump just at the magnetic ordering temperature TN. Moreover, both the direct (magnetic field control of dielectric properties) and converse (electric field control of magnetization) magnetoelectric effects have been observed in the multiferroic state. This work opens up new insights on the origin of ferroelectricity in MOFs and highlights their promise as magnetoelectric multiferroics.
authors.affiliation: Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Tian
authors.affiliation: CNR-SPIN, UOS L'Aquila, Italy.
authors.forename: Alessandro
authors.initials: A
authors.lastname: Stroppa
authors.affiliation: Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Yisheng
authors.initials: Y
authors.lastname: Chai
authors.affiliation: Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Liqin
authors.initials: L
authors.lastname: Yan
authors.affiliation: Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Shouguo
authors.initials: S
authors.lastname: Wang
authors.affiliation: CNR-SPIN, UOS L'Aquila, Italy.
authors.forename: Paolo
authors.initials: P
authors.lastname: Barone
authors.affiliation: CNR-SPIN, UOS L'Aquila, Italy.
authors.forename: Silvia
authors.initials: S
authors.lastname: Picozzi
authors.affiliation: Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Young
authors.initials: Y
authors.lastname: Sun