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

页码：310 / 313

页数：4

共 17 条

[1] ALTERNATING-CURRENT SUSCEPTIBILITY, HIGH-FIELD MAGNETIZATION, AND MILLIMETER BAND EPR EVIDENCE FOR A GROUND S = 10 STATE IN [MN12O12(CH3COO)16(H2O)4].2CH3COOH.4H2O [J].