Observation of Resonant Quantum Magnetoelectric Effect in a Multiferroic Metal–Organic Framework

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• 作者：Ying Tian ; Shipeng Shen ; Junzhuang Cong ; Liqin Yan ; Shouguo Wang ; Young Sun
• 刊名：Journal of the American Chemical Society
• 出版年：2016
• 出版时间：January 27, 2016
• 年：2016
• 卷：138
• 期：3
• 页码：782-785
• 全文大小：348K
• ISSN：1520-5126

文摘

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 T_N ≈ 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.