The relaxation times in tetranuclear manganese complex with S=8

被引：6

作者：

Yamaguchi, A

Ishimoto, H

Awaga, K

Yoo, JS

Nakano, M

Hendrickson, DN

Brechin, EK

Christou, G

机构：

[1] Univ Tokyo, Inst Solid State Phys, Tokyo 1068666, Japan

[2] Univ Tokyo, Grad Sch Arts & Sci, Dept Basic Sci, Tokyo 1530041, Japan

[3] Univ Calif San Diego, Dept Chem & Biochem 0358, La Jolla, CA 92093 USA

来源：

PHYSICA B | 2000年 / 284卷

关键词：

macroscopic quantum tunneling; magnetism;

D O I：

10.1016/S0921-4526(99)02477-1

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Magnetization relaxation of [Mn-4(hpdm)(6)(OAc)(2)](ClO4)(2) with S = 8 ground state has been investigated with AC susceptibility and DC magnetization measurements below 4 K. The temperature dependence of the relaxation time follows the Arrhenius law with activation energy E = 17 K above 1 K. At lower temperatures, the relaxation deviates from the thermal activation formula and becomes temperature independent below 0.5 K with tau(sat) similar to 10(4) s. These observations are attributed to magnetic quantum tunneling. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：1225 / 1226

页数：2

共 9 条

[1] Resonant magnetization tunneling in the trigonal pyramidal Mn(IV)Mn-3(III) complex [Mn4O3Cl(O2CCH3)3(dbm)3] [J].