Internal magnetic structure of Mn12 acetate by polarized neutron diffraction

被引：34

作者：

Robinson, RA

Brown, PJ

Argyriou, DN

Hendrickson, DN

Aubin, SMJ

机构：

[1] Los Alamos Natl Lab, LANSCE 12, Los Alamos, NM 87545 USA

[2] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA

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

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2000年 / 12卷 / 12期

关键词：

D O I：

10.1088/0953-8984/12/12/318

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The internal magnetic structure of [Mn12O12(CD3COO)(16)(H2O)(4)]. 2CD(3)COOH . 4H(2)O as determined by polarized-beam single-crystal neutron diffraction is reported. The standard picture, in which the inner tetrahedron of(S = 3/2) Mn4+ ions is polarized antiparallel to an outer ring of eight (S = 2) Mn3+ ions, is confirmed directly. While the total magnetization for the molecule is in good agreement with bulk measurements, the individual moment components on each of the three symmetry-independent Mn sites are less than predicted by the standard picture. There is no evidence for net moments on the oxygen atoms, but overlap of positive and negative magnetization on the oxygen sites cannot be ruled out.

引用

页码：2805 / 2810

页数：6

共 18 条

[1] High-frequency EPR spectra of a molecular nanomagnet: Understanding quantum tunneling of the magnetization [J].