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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

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Volltext ()

Nature Communications 10 (2019), Art. 3260, 9 S.
ISSN: 2041-1723
European Commission EC
SPP 1928; 2DMATER
Building Blocks for Functional Systems
Deutsche Forschungsgemeinschaft DFG
EXC1056;
Englisch
Zeitschriftenaufsatz, Elektronische Publikation
Fraunhofer IKTS ()

Abstract
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.

: http://publica.fraunhofer.de/dokumente/N-559047.html