Quantum resonance of the magnetisation in a single-crystal of Mn12-ac

被引：35
作者：
Barbara, B
Thomas, L
Lionti, F
Sulpice, A
Caneschi, A
机构：
[1] CNRS, Lab Magnetisme Louis Neel, F-38042 Grenoble, France
[2] CNRS, CRTBT, F-38042 Grenoble, France
[3] Univ Florence, Dept Chem, I-50144 Florence, Italy
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1998年 / 177卷
关键词：
tunnelling; magnetic relaxation; clusters;
D O I：
10.1016/S0304-8853(97)00806-8
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this study we raise a few questions regarding the hypothesis of conservation of the collective spin in molecular crystals, some of them of interest for a deeper understanding of resonant tunnelling in Mn-12-ac. We also show experimentally that in this system, resonant tunnelling is not solely thermally activated, but takes place from the ground state m = 10 below 2 K. The effects of a quartic anisotropy term on magnetization curves and resonance shifts are discussed. (C) 1998 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：1324 / 1329
页数：6
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