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 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.
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机译：半导体中铁磁性的实现是自旋电子学应用发展的诱人途径。在这里，我们报告一个具有自发性的半导体层状金属有机骨架（MOF），即K3Fe2 [（（2,3,9,10,16,17,23,24-八羟基酞菁氰）Fe]（K3Fe2 [PcFe-O8]）磁化。这种分层的MOF具有面内完全π-d共轭特性，并表现出半导体行为，室温载流子迁移率为15±2 cm 2 V -1 s -通过时间分辨太赫兹光谱法确定为1 。磁化实验和 57 FeMössbauer光谱表明，K3Fe2 [PcFe-O8]中存在长距离磁相关性，这是由于铁中心之间通过离域π电子的磁耦合而引起的。该样品由于晶体尺寸的分布而表现出超顺磁性，并具有高达350 K的磁滞，我们的工作为利用磁性MOF半导体开发自旋电子材料奠定了基础。
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