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Probing magnetic order and disorder in the one-dimensional molecular spin chains CuF2(pyz) and [Ln(hfac)3(boaDTDA)] n (Ln  =  Sm, La) using implanted muons.

Lancaster, T. and Huddart, B. M. and Williams, R. C. and Xiao, F. and Franke, K. J. A. and Baker, P. J. and Pratt, F. L. and Blundell, S. J. and Schlueter, J. A. and Mills, M. B. and Maahs, A. C. and Preuss, K. E. (2019) 'Probing magnetic order and disorder in the one-dimensional molecular spin chains CuF2(pyz) and [Ln(hfac)3(boaDTDA)] n (Ln  =  Sm, La) using implanted muons.', Journal of physics : condensed matter., 31 (39). p. 394002.

Abstract

We present the results of muon-spin relaxation (SR) measurements on antiferromagnetic and ferromagnetic spin chains. In antiferromagnetic CuF2(pyz) we identify a transition to long range magnetic order taking place at K, allowing us to estimate a ratio with the intrachain exchange of and the ratio of interchain to intrachain exchange coupling as . The ferromagnetic chain [Sm(hfac)3(boaDTDA)] n undergoes an ordering transition at K, seen via a broad freezing of dynamic fluctuations on the muon (microsecond) timescale and implying . The ordered radical moment continues to fluctuate on this timescale down to 0.3 K, while the Sm moments remain disordered. In contrast, the radical spins in [La(hfac)3(boaDTDA)] n remain magnetically disordered down to T  =  0.1 K suggesting .

Item Type:Article
Full text:(AM) Accepted Manuscript
Available under License - Creative Commons Attribution Non-commercial No Derivatives.
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Status:Peer-reviewed
Publisher Web site:https://doi.org/10.1088/1361-648X/ab2cb6
Publisher statement:Accepted manuscript is available under the term of a CC BY-NC-ND 3.0 licence
Date accepted:21 June 2019
Date deposited:06 August 2019
Date of first online publication:10 July 2019
Date first made open access:10 July 2020

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