Neutron spectroscopy for the magnetic anisotropy of molecular clusters

被引：208
作者：
Caciuffo, R
Amoretti, G
Murani, A
Sessoli, R
Caneschi, A
Gatteschi, D
机构：
[1] Univ Ancona, Dipartimento Sci Mat & Terra, Ist Nazl Fis Mat, I-60131 Ancona, Italy
[2] Univ Parma, Dipartimento Fis, Ist Nazl Fis Mat, I-43100 Parma, Italy
[3] Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France
[4] Univ Florence, Dipartimento Chim, I-50144 Florence, Italy
来源：
PHYSICAL REVIEW LETTERS | 1998年 / 81卷 / 21期
关键词：
D O I：
10.1103/PhysRevLett.81.4744
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Neutron spectroscopy has been used to observe transitions between the energy levels for the 21 different orientations of the S = 10 spin ground state of an octanuclear iron molecular cluster (Fe-8) exhibiting quantum tunneling of the magnetization. The results obtained on nondeuterated samples provide the first direct measurement of the zero-field splitting in a large cluster nanomagnet. A reliable and accurate determination of the composition of the cluster's spin wave functions and the spin-Hamiltonian parameters are deduced from the experimental observations, giving crucial information for the study of the macroscopic quantum tunneling process. [S0031 -9007(98)07673-X].
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页码：4744 / 4747
页数：4
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