Low temperature spin dynamics in Cr7Ni-Cu-Cr7Ni coupled molecular rings

被引：2

作者：

Bordonali, L. ^{[1
,2
,3
,4
,5
]}

Furukawa, Y. ^{[3
,4
]}

Mariani, M. ^{[1
,2
]}

Sabareesh, K. P. V. ^{[1
,2
]}

Garlatti, E. ^{[6
,7
,8
]}

Carretta, S. ^{[8
,9
]}

Lascialfari, A. ^{[1
,2
,6
,7
,9
]}

Timco, G. ^{[10
]}

Winpenny, R. E. P. ^{[10
]}

Borsa, F. ^{[1
,2
,3
,4
]}

机构：

[1] Univ Pavia, INSTM, I-27100 Pavia, Italy

[2] Univ Pavia, Dept Phys, I-27100 Pavia, Italy

[3] Iowa State Univ, Ames Lab, Ames, IA 50011 USA

[4] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA

[5] Univ Uniroma TRE, Dept Phys E Amaldi, Rome, Italy

[6] Univ Milan, INSTM, I-20133 Milan, Italy

[7] Univ Milan, Dept Phys, I-20133 Milan, Italy

[8] Univ Parma, Dipartimento Fis, I-43100 Parma, Italy

[9] S3 CNR, Inst Nanosci, I-41125 Modena, Italy

[10] Univ Manchester, Lewis Magnetism Lab, Manchester M13 9PL, Lancs, England

来源：

JOURNAL OF APPLIED PHYSICS | 2014年 / 115卷 / 17期

关键词：

Temperature - Binary alloys - Copper alloys - Nuclear magnetic resonance - Spin dynamics - Freezing;

D O I：

10.1063/1.4853255

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Proton Nuclear Magnetic Resonance (NMR) relaxation measurements have been performed down to very low temperature (50 mK) to determine the effect of coupling two Cr7Ni molecular rings via a Cu2+ ion. No difference in the spin dynamics was found from nuclear spin lattice relaxation down to 1.5 K. At lower temperature, the H-1-NMR line broadens dramatically indicating spin freezing. From the plot of the line width vs. magnetization, it is found that the freezing temperature is higher (260 mK) in the coupled ring with respect to the single Cr7Ni ring (140 mK). (C) 2014 AIP Publishing LLC.

引用

页数：3

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