Spin Fluctuations of Paramagnetic Rh Clusters Revealed by X-Ray Magnetic Circular Dichroism

被引：16

作者：

Barthem, V. M. T. S. ^{[1
]}

Rogalev, A. ^{[2
]}

Wilhelm, F. ^{[2
]}

Sant'Anna, M. M. ^{[1
]}

Mello, S. L. A. ^{[1
]}

Zhang, Y. ^{[3
]}

Bayle-Guillemaud, P. ^{[4
]}

Givord, D. ^{[1
,3
]}

机构：

[1] Univ Fed Rio de Janeiro, Inst Fis, BR-21941972 Rio De Janeiro, Brazil

[2] European Synchrotron Radiat Facil, F-38043 Grenoble, France

[3] CNRS UJF, Inst Neel, F-38042 Grenoble 9, France

[4] LEMMA, SP2M, CEA INAC UJF, F-38054 Minatec Grenoble, France

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 109卷 / 19期

关键词：

TIGHT-BINDING; PD; PROBE;

D O I：

10.1103/PhysRevLett.109.197204

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The magnetic moment induced on Rh atoms, forming 1.6 nm average diameter clusters, embedded in an Al2O3 matrix, has been determined using x-ray magnetic circular dichroism measurements. The magnetic moment varies linearly with the applied magnetic field. At 2.3 K and under 17 T, the spin magnetic moment amounts to 0.067(2) mu(B)/Rh atom. The orbital moment does not exceed 2% of the spin moment. The susceptibility is highly temperature dependent. This is in agreement with a prediction due to Moriya and Kawabata, that in itinerant electron systems, close to the onset of magnetism, the renormalization of the magnetic susceptibility by electron correlations, leads to a Curie-like behavior.

引用

页数：5

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