Microscopic spin Hamiltonian of a Cr8 antiferromagnetic ring from inelastic neutron scattering -: art. no. 094405

被引：122

作者：

Carretta, S

van Slageren, J

Guidi, T

Liviotti, E

Mondelli, C

Rovai, D

Cornia, A

Dearden, AL

Carsughi, F

Affronte, M

Frost, CD

Winpenny, REP

Gatteschi, D

Amoretti, G

Caciuffo, R

机构：

[1] Univ Parma, Dipartimento Fis, Ist Nazl Fis Mat, I-43100 Parma, Italy

[2] Univ Florence, Dipartimento Chim, I-50019 Sesto Fiorentino, Italy

[3] Consorzio Interuniv Nazl Sci & Tecnol Mat, Unita Ric Firenze, I-50019 Sesto Fiorentino, Italy

[4] Univ Ancona, Ist Nazl Fis Mat, I-60131 Ancona, Italy

[5] Inst Max Von Laue Paul Langevin, Ist Nazl Fis Mat, Operat Grp Grenoble, F-38042 Grenoble, France

[6] Univ Modena & Reggio Emilia, Dipartimento Chim, I-41100 Modena, Italy

[7] Consorzio Interuniv Nazl Sci & Tecnol Mat, Unita Ric Modena, I-41100 Modena, Italy

[8] Univ Manchester, Dept Chem, Manchester M13 9PL, Lancs, England

[9] Univ Modena & Reggio Emilia, Ist Nazl Fis Mat, Natl Res Ctr S3, I-41100 Modena, Italy

[10] Univ Modena & Reggio Emilia, Dipartimento Fis, I-41100 Modena, Italy

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

来源：

PHYSICAL REVIEW B | 2003年 / 67卷 / 09期

关键词：

D O I：

10.1103/PhysRevB.67.094405

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Exchange integrals and single-ion anisotropy parameters of a ring-shaped molecular cluster, comprising eight chromium(III) ions (s = 3/2) were determined by inelastic neutron scattering. Effects due to the mixing of different spin multiplets have been considered. Such effects proved to be important to correctly reproduce the relative intensity of magnetic excitations in the neutron spectra. Evidence of decreasing lifetimes with increasing energy of excited spin states was found. The microscopic picture emerging from neutron spectroscopy was confirmed by the temperature dependence of the heat capacity.

引用

页码：944051 / 944058

页数：8

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