Magnetic Exchange Interactions in the Molecular Nanomagnet Mn12

被引：32

作者：

Chiesa, A. ^{[1
,2
]}

Guidi, T. ^{[3
]}

Carretta, S. ^{[1
]}

Ansbro, S. ^{[4
,5
,6
]}

Timco, G. A. ^{[4
,5
]}

Vitorica-Yrezabal, I. ^{[4
,5
]}

Garlatti, E. ^{[1
]}

Amoretti, G. ^{[1
]}

Winpenny, R. E. P. ^{[4
,5
]}

Santini, P. ^{[1
]}

机构：

[1] Univ Parma, Dipartimento Sci Matemat Fis & Informat, I-43124 Parma, Italy

[2] Forschungszentrum Julich, Inst Adv Simulat, D-52425 Julich, Germany

[3] Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England

[4] Univ Manchester, Sch Chem, Manchester M13 9PL, Lancs, England

[5] Univ Manchester, Photon Sci Inst, Manchester M13 9PL, Lancs, England

[6] Inst Laue Langevin, 71 Ave Martyrs CS 20156, F-38042 Grenoble 9, France

来源：

PHYSICAL REVIEW LETTERS | 2017年 / 119卷 / 21期

基金：

英国工程与自然科学研究理事会;

关键词：

INELASTIC NEUTRON-SCATTERING; TEMPERATURE LANCZOS METHOD; SINGLE-CRYSTAL; AXIAL SYMMETRY; CLUSTERS; SPECTROSCOPY; EXCITATIONS; ANISOTROPY; DYNAMICS; QUBITS;

D O I：

10.1103/PhysRevLett.119.217202

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The discovery of magnetic bistability in Mn-12 more than 20 years ago marked the birth of molecular magnetism, an extremely fertile interdisciplinary field and a powerful route to create tailored magnetic nanostructures. However, the difficulty to determine interactions in complex polycentric molecules often prevents their understanding. Mn-12 is an outstanding example of this difficulty: although it is the forefather and most studied of all molecular nanomagnets, an unambiguous determination of even the leading magnetic exchange interactions is still lacking. Here we exploit four-dimensional inelastic neutron scattering to portray how individual spins fluctuate around the magnetic ground state, thus fixing the exchange couplings of Mn-12 for the first time. Our results demonstrate the power of four-dimensional inelastic neutron scattering as an unrivaled tool to characterize magnetic clusters.

引用

页数：6

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