تقرير
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
| العنوان: | 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 |
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| المؤلفون: | Lancaster, T., Huddart, B. M., Williams, R. C., Xiao, F., Franke, K. J. A., Baker, P. J., Pratt, F. L., Blundell, S. J., Schlueter, J. A., Mills, M. B., Maahs, A. C., Preuss, K. E. |
| سنة النشر: | 2019 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Strongly Correlated Electrons |
| الوصف: | We present the results of muon-spin relaxation ($\mu^{+}$SR) measurements on antiferromagnetic and ferromagnetic spin chains. In antiferromagnetic CuF$_{2}$(pyz) we identify a transition to long range magnetic order taking place at $T_{\mathrm{N}} = 0.6(1)$ K, allowing us to estimate a ratio with the intrachain exchange of $T_{\mathrm{N}}/|J| \approx 0.1$ and the ratio of interchain to intrachain exchange coupling as $|J'/J| \approx 0.05$. The ferromagnetic chain [Sm(hfac)$_{3}$(boaDTDA)]$_{n}$ undergoes an ordering transition at $T_{\mathrm{c}}=2.8(1)$ K, seen via a broad freezing of dynamic fluctuations on the muon (microsecond) timescale and implying $T_{\mathrm{c}}/|J| \approx 0.6$. 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 $T_{\mathrm{c}}/|J| < 0.17$. Comment: 13 pages, 5 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1088/1361-648X/ab2cb6 |
| URL الوصول: | http://arxiv.org/abs/1905.04913 |
| رقم الأكسشن: | edsarx.1905.04913 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1088/1361-648X/ab2cb6 |
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