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A semiconducting layered metal-organic framework magnet

: Yang, Chongqing; Dong, Renhao; Wang, Mao; Petkov, Petko S.; Zhang, Zhitao; Wang, Mingchao; Han, Peng; Ballabio, Marco; Bräuninger, Sascha A.; Liao, Zhongquan; Zhang, Jichao; Schwotzer, Friedrich; Zschech, Ehrenfried; Klauss, Hans-Henning; Canovas, Enrique; Kaskel, Stefan; Bonn, Mischa; Zhou, Shengqiang; Heine, Thomas; Feng, Xinliang

Volltext ()

Nature Communications 10 (2019), Art. 3260, 9 S.
ISSN: 2041-1723
Deutsche Forschungsgemeinschaft DFG
Building Blocks for Functional Systems
Deutsche Forschungsgemeinschaft DFG
Zeitschriftenaufsatz, Elektronische Publikation
Fraunhofer IKTS ()

The 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 pi-d conjugation and exhibits semiconducting behavior with a room temperature carrier mobility of 15±2cm2V-1s-1 as determined by time-resolved Terahertz spectroscopy. Magnetization experiments and 57Fe Mossbauer spectroscopy demonstrate the presence of long-range magnetic correlations in K3Fe2[PcFe-O8] arising from the magnetic coupling between iron centers via delocalized pi electrons. The sample exhibits superparamagnetic features due to a distribution of crystal size and possesses magnetic hysteresis up to 350K. Our work sets the stage for the development of spintronic materials exploiting magnetic MOF semiconductors.