A semiconducting layered metal-organic framework magnet

• DOI: 10.1038/s41467-019-11267-w
• Publication Date: 2019-07-22T10:02:40Z
• Authors: Chongqing Yang; Renhao Dong; Mao Wang; Petko St. Petkov; Zhitao Zhang; Mingchao Wang; Peng Han; Marco Ballabio; Sascha A. Bräuninger; Zhongquan Liao; Jichao Zhang; Friedrich Schwotzer; Ehrenfried Zschech; Hans-Henning Klauss; Enrique Cánovas; Stefan Kaskel; Mischa Bonn; Shengqiang Zhou; Thomas Heine; Xinliang Feng
• Keywords: Science; Q; 01 natural sciences; 7. Clean energy; Article; 0104 chemical sciences

AbstractThe realization of ferromagnetism in semiconductors is an attractive avenue for the development of spintronic applications. Here, we report a semiconducting layered metal-organic framework (MOF), namely K3Fe2[(2,3,9,10,16,17,23,24-octahydroxy phthalocyaninato)Fe] (K3Fe2[PcFe-O8]) with spontaneous magnetization. This layered MOF features in-plane full π-d conjugation and exhibits semiconducting behavior with a room temperature carrier mobility of 15 ± 2 cm2 V−1 s−1 as determined by time-resolved Terahertz spectroscopy. Magnetization experiments and 57Fe Mössbauer spectroscopy demonstrate the presence of long-range magnetic correlations in K3Fe2[PcFe-O8] arising from the magnetic coupling between iron centers via delocalized π electrons. The sample exhibits superparamagnetic features due to a distribution of crystal size and possesses magnetic hysteresis up to 350 K. Our work sets the stage for the development of spintronic materials exploiting magnetic MOF semiconductors.