Magnetic relaxation in molecular nanostructures

被引：19

作者：

Novak, M. A. ^{[1
]}

机构：

[1] Univ Fed Rio de Janeiro, Inst Fis, BR-21945970 Rio De Janeiro, Brazil

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2004年 / 272卷

关键词：

magnetic relaxation; low-dimensional magnetism; molecular magnet;

D O I：

10.1016/j.jmmm.2003.12.1384

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Molecular magnetic materials present a wide range of magnetic relaxation phenomena. In particular, the chemists bottom-up approach to build molecular nanostructures provided this field with some unprecedented model systems, as the quasi isolated nanomagnets Mn-12 and Fe-8; ferrimagnetic chains and planar structure with high anisotropy presenting very slow relaxation, and also several disordered systems with glassy behavior. In this paper we will review some aspects of magnetic relaxation, in particular thermally activated quantum tunneling in nanomagnets, as well as its influence in specific heat experiments. The dynamics of low-dimensional magnetic molecular systems and the similarity with spin glasses will also be discussed. (C) 2003 Elsevier B. V. All rights reserved.

引用

页码：E707 / E713

页数：7

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