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Molecular building blocks for magnetic spin chains

Hu, Jingshi and Sun, Jibin and Hopkins, Michael D. and Rosenbaum, T. F. (2006) Molecular building blocks for magnetic spin chains. Journal of Physics: Condensed Matter, 18 (48). pp. 10837-10841. ISSN 0953-8984. doi:10.1088/0953-8984/18/48/010.

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The paramagnetic di(metalloethynyl)benzene ion [1,4-C_6H_4{CW(depe)_2Cl}_2]^(2+) was synthesized from diamagnetic 1,4-C_6H_4{CW(depe)_2Cl}_2 (depe = 1,2-bis(diethylphosphino)ethane). Systematic measurements of magnetic susceptibility for both crystalline and powder-formed compounds indicate a predominant super-exchange coupling between the magnetic tungsten centres. We provide a quantitative description of the observed susceptibility using a decoupled Heisenberg dimer model, and find that all the complexes exhibit a robust antiferromagnetic coupling between spins, J~38 K. We note their potential use as building blocks for one-dimensional spin chains—with or without disorder—and describe possible synthetic routes to these architectures.

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Additional Information:© 2006 IOP Publishing. Received 3 August 2006, in final form 6 October 2006. Published 17 November 2006. We are grateful to S Ghosh for her valuable help in the initial stages of this investigation, and Dr Ian Steele for assistance with sample characterization. TFR acknowledges support from the US Department of Energy Grant No DE-FG02-99ER45789. JH acknowledges support from the Consortium for Nanoscience Research. MDH acknowledges support through the NSF MRSEC programme under Grant DMR-0213745.
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Department of Energy (DOE)DE-FG02-99ER45789
Consortium for Nanoscience ResearchUNSPECIFIED
Subject Keywords:Condensed matter: electrical, magnetic and optical
Issue or Number:48
Classification Code:PACS 75.30.Cr Saturation moments and magnetic susceptibilities 75.20.-g Diamagnetism, paramagnetism, and superparamagnetism 75.60.Ej Magnetization curves, hysteresis, Barkhausen and related effects 75.30.Et Exchange and superexchange interactions 75.10.Jm
Record Number:CaltechAUTHORS:20140707-163027955
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:46948
Deposited By: George Porter
Deposited On:08 Jul 2014 21:44
Last Modified:12 Jul 2022 16:31

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