Quantum tunneling in a three-dimensional network of exchange-coupled single-molecule magnets

被引：66

作者：

Tiron, R

Wernsdorfer, W

Aliaga-Alcalde, N

Christou, G

机构：

[1] UJF, CNRS, Lab Louis Neel, F-38042 Grenoble 9, France

[2] Univ Florida, Dept Chem, Gainesville, FL 32611 USA

来源：

PHYSICAL REVIEW B | 2003年 / 68卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.68.140407

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A Mn-4 single-molecule magnet is used to show that quantum tunneling of magnetization is not suppressed by moderate three-dimensional exchange coupling between molecules. Instead, it leads to an exchange bias of the quantum resonances which allows precise measurements of the effective exchange coupling that is mainly due to weak intermolecular hydrogen bonds. The magnetization versus applied field was recorded on single crystals of [Mn-4](2) using an array of micro-superconducting quantum interference devices. The step fine structure was studied via minor hysteresis loops.

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