Effects of intercluster coupling in high spin molecular magnets

被引：11

作者：

Affronte, A

Sessoli, R

Gatteschi, D

Wernsdorfer, W

Lasjaunias, JC

Heath, SL

Powell, AK

Fort, A

Rettori, A

机构：

[1] Univ Modena, INFM S, Natl Res Ctr Nanostruct & Biosyst Surfaces, I-41100 Modena, Italy

[2] Univ Modena, Dipartimento Fis, I-41100 Modena, Italy

[3] Univ Florence, INSTM, I-50019 Sesto Fiorentino, Italy

[4] Univ Florence, Dipartimento Chim, I-50019 Sesto Fiorentino, Italy

[5] CNRS, Lab Louis Neel, F-38042 Grenoble, France

[6] CNRS, Ctr Rech Tres Basses Temp, F-38042 Grenoble, France

[7] Univ York, Dept Chem, York YO10 5DD, N Yorkshire, England

[8] Univ Karlsruhe, Inst Inorgan Chem, D-76131 Karlsruhe, Germany

[9] Univ Florence, INFM, I-50019 Sesto Fiorentino, Italy

[10] Univ Florence, Dipartimento Fis, I-50019 Sesto Fiorentino, Italy

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2004年 / 65卷 / 04期

关键词：

D O I：

10.1016/j.jpcs.2003.11.009

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report evidences for long-range antiferromagnetic (AF) order in iron oxyhydroxides Fe(19)metheidi and (enH(2))(2)Fe-6 clusters that at low temperature behave like single molecule magnets with total spin S = 33/2 and S = 5, respectively. Anomalies are clearly observed at 1.19 K in the heat capacity and in the low-field magnetization of Fe(19)metheidi while for (enH(2))(2)Fe-6 a broad gimel-peak is found at 0.99 K in the heat capacity. Since dipolar interactions are estimated to be similar to190 mK and similar to40 mK for Fe(19)metheidi and (enH(2))(2)Fe-6, respectively, the origin of the A-F ordering is due to super-exchange in these cases. (C) 2003 Elsevier Ltd. All rights reserved.

引用

页码：745 / 748

页数：4

共 12 条

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