Element-specific probe of the magnetic and electronic properties of Dy incar-fullerenes

被引：23

作者：

Bondino, F

Cepek, C

Tagmatarchis, N

Prato, M

Shinohara, H

Goldoni, A

机构：

[1] INFM, CNRS, Lab Nazl TASC, I-34012 Trieste, Italy

[2] Natl Hellen Res Fdn, Inst Theoret & Phys Chem, GR-11635 Athens, Greece

[3] Univ Trieste, Dipartimento Sci Farmaceut, I-34127 Trieste, Italy

[4] Sincrotrone Trieste SCpA, I-34012 Trieste, Italy

[5] Nagoya Univ, Dept Chem, Nagoya, Aichi 4648602, Japan

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2006年 / 110卷 / 14期

关键词：

D O I：

10.1021/jp055938z

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The magnetic and electronic properties of a single atom and a pair of Dy atoms encapsulated inside fullerene carbon cages have been examined using X-ray absorption spectroscopy (XAS) and X-ray magnetic circular dichroism (XMCD) as well as resonant photoelectron spectroscopy (RESPES) across the Dy M-4.5-edge. The comparison of the measured XAS spectra with multiplet calculations indicates that the encaged Dy has a 4f(9) configuration. The presence of Dy 5d spectral weight in the valence band is not detected by RESPES, indicating that Dy is in a formally trivalent state. The evolution of the encaged Dy orbital and spin moments of the 4f orbitals as a function of the applied magnetic field and temperature has been obtained from XMCD measurements. At 6.9 T and 4 K, both the orbital and the spin magnetic moments of the encaged Dy 4f electrons are dramatically smaller than those expected for the free Dy3+ at saturation.

引用

页码：7289 / 7295

页数：7

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