title: Observation of Resonant Quantum Magnetoelectric Effect in a Multiferroic Metal-Organic Framework.
abstract: A resonant quantum magnetoelectric coupling effect has been demonstrated in the multiferroic metal-organic framework of [(CH3)2NH2]Fe(HCOO)3. This material shows a coexistence of a spin-canted antiferromagnetic order and ferroelectricity as well as clear magnetoelectric coupling below TN ≈ 19 K. In addition, a component of single-ion quantum magnets develops below ∼ 8 K because of an intrinsic magnetic phase separation. The stair-shaped magnetic hysteresis loop at 2 K signals resonant quantum tunneling of magnetization. Meanwhile, the magnetic field dependence of dielectric permittivity exhibits sharp peaks just at the critical tunneling fields, evidencing the occurrence of resonant quantum magnetoelectric coupling effect. This resonant effect enables a simple electrical detection of quantum tunneling of magnetization.
authors.affiliation: State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences , Beijing 100190, PR China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Tian
authors.affiliation: State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences , Beijing 100190, PR China.
authors.forename: Shipeng
authors.initials: S
authors.lastname: Shen
authors.affiliation: State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences , Beijing 100190, PR China.
authors.forename: Junzhuang
authors.initials: J
authors.lastname: Cong
authors.affiliation: State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences , Beijing 100190, PR China.
authors.forename: Liqin
authors.initials: L
authors.lastname: Yan
authors.affiliation: State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences , Beijing 100190, PR China.
authors.forename: Shouguo
authors.initials: S
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences , Beijing 100190, PR China.
authors.forename: Young
authors.initials: Y
authors.lastname: Sun