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A semiconducting layered metal-organic framework magnet.

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 ?-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 ? 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.

SUBMITTER: Yang C 

PROVIDER: S-EPMC6646349 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature

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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 K<sub>3</sub>Fe<sub>2</sub>[(2,3,9,10,16,17,23,24-octahydroxy phthalocyaninato)Fe] (K<sub>3</sub>Fe<sub>2</sub>[PcFe-O<sub>8</sub>]) with spontaneous magnetization. This layered MOF features in-plane full π-d conjugation and exhibits semiconducting behavior with a room temperature carrier mobilit  ...[more]

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