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Title: Origin of long-range ferromagnetic ordering in metal–organic frameworks with antiferromagnetic dimeric-Cu(II) building units
Authors: Göettlicher, Jörg
Yi, Jiabao
Li, Sean
Wang, Lan
Ding, Jun
Chen, Banglin
Wei, Su-Huai
Feng, Yuan Ping
Shen, Lei
Yang, Shuo-Wang
Xiang, Shengchang
Liu, Tao
Zhao, Bangchuan
Ng, Man-Fai
Issue Date: 2012
Source: Shen, L., Yang, S. W., Xiang, S., Liu, T., Zhao, B., Ng, M. F., et al. (2012). Origin of Long-Range Ferromagnetic Ordering in Metal–Organic Frameworks with Antiferromagnetic Dimeric-Cu(II) Building Units. Journal of the American Chemical Society, 134(41), 17286-17290.
Series/Report no.: Journal of the American chemical society
Abstract: Even though metal–organic frameworks (MOFs) derived from antiferromagnetic dimeric-Cu(II) building units and nonmagnetic molecular linkers are known to exhibit unexpected ferromagnetic behavior, a comprehensive understanding of the underlying mechanism remains elusive. Using a combined theoretical and experimental approach, here we reveal the origin of the long-range ferromagnetic coupling in a series of MOFs, constructed from antiferromagnetic dimeric-Cu(II) building blocks. Our studies show that the strong localization of copper vacancy states favors spontaneous spin polarization and formation of local moment. These copper vacancy-induced moments are coupled via the itinerant electrons in the conjugated aromatic linkers to establish a long-range ferromagnetic ordering. The proposed mechanism is supported by direct experimental evidence of copper vacancies and the magnetic hysteresis (M-H) loops.
DOI: 10.1021/ja3077654
Rights: © 2012 American Chemical Society.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:SPMS Journal Articles

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