The observation of magnetization behavior of the nano-scale cluster magnet Mn12ac by 55Mn NMR

被引：8
|
作者：
Kubo, T [1 ]
Koshiba, T
Goto, T
Oyamada, A
Fujii, Y
Takeda, K
Awaga, K
机构：
[1] Nara Univ Educ, Dept Phys, Nara 6308528, Japan
[2] Kyoto Univ, Grad Sch Human & Environm Studies, Kyoto 6068501, Japan
[3] Univ Tokyo, Grad Sch Arts & Sci, Tokyo 1530041, Japan
来源：
PHYSICA B | 2001年 / 294卷
关键词：
molecular magnet Mn(12)ac; magnetic relaxation; quantum tunneling;
D O I：
10.1016/S0921-4526(00)00666-9
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
In view of microscopic observation of the magnetization behavior in Mn(12)ac, Mn-55 NMR of Mn4+ was studied for oriented crystals, with external fields applied along the c-axis. The magnetic relaxation shortly after magnetization reversal has been confirmed to be of the form 1 - exp{ - root (t/tau)}, where the relaxation time tau seems to be affected by nuclear relaxation. Evidence of phonon-activated resonant quantum tunneling is the occurrence of regular dips in the field dependence of tau. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：310 / 313
页数：4
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