Size dependence of the magnetic moments of exposed nanoscale iron particles

被引：48

作者：

Edmonds, KW

Binns, C ^{[1
]}

Baker, SH

Maher, MJ

Thornton, SC

Tjernberg, O

Brookes, NB

机构：

[1] Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England

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

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2001年 / 231卷 / 01期

关键词：

nanoscale magnetism;

D O I：

10.1016/S0304-8853(00)01349-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The magnetic moments in exposed, mass-selected, nanoscale Fe clusters in the size range 1.89-2.20 nm (300-475 atoms), deposited onto graphic in situ have been measured by X-ray magnetic circular dichroism. The smallest clusters possess moments that are enhanced by around 4% for m(spin) and 80% for m(orb) and decrease towards the bulk value with increasing size. The larger clusters show an in-plane anisotropy that is consistent with the anisotropy in the orbital moment. The smallest clusters are, within experimental error, magnetically isotropic. The anisotropy constant in the 475-atom clusters is significantly higher than the bulk value. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：113 / 119

页数：7

共 34 条

[21] Magnetism of epitaxial 3d-transition-metal monolayers on graphite [J].

Kruger, P ;

Rakotomahevitra, A ;

Parlebas, JC ;

Demangeat, C .

PHYSICAL REVIEW B, 1998, 57 (09) :5276-5280

[22] ELECTRONIC PROPERTIES OF METALLIC FINE PARTICLES .1. [J].

KUBO, R .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1962, 17 (06) :975-&

[23] ORBITAL AND SPIN SUM-RULES IN X-RAY MAGNETIC CIRCULAR-DICHROISM [J].

OBRIEN, WL ;

TONNER, BP .

PHYSICAL REVIEW B, 1994, 50 (17) :12672-12681

[24] High-frequency ferromagnetic resonance on ultrafine cobalt particles [J].

Respaud, M ;

Goiran, M ;

Broto, JM ;

Yang, FH ;

Ould-Ely, T ;

Amiens, C ;

Chaudret, B .

PHYSICAL REVIEW B, 1999, 59 (06) :R3934-R3937

[25] X-ray magnetic circular dichroism spectroscopy of transition metal multilayers [J].

Stohr, J ;

Nakajima, R .

JOURNAL DE PHYSIQUE IV, 1997, 7 (C2) :47-57

[26] DETERMINATION OF SPIN-MOMENT AND ORBITAL-MOMENT ANISOTROPIES IN TRANSITION-METALS BY ANGLE-DEPENDENT X-RAY MAGNETIC CIRCULAR-DICHROISM [J].

STOHR, J ;

KONIG, H .

PHYSICAL REVIEW LETTERS, 1995, 75 (20) :3748-3751

[27] A MECHANISM OF MAGNETIC HYSTERESIS IN HETEROGENEOUS ALLOYS [J].

STONER, EC ;

WOHLFARTH, EP .

PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL AND PHYSICAL SCIENCES, 1948, 240 (826) :599-642

[28] X-RAY CIRCULAR-DICHROISM AS A PROBE OF ORBITAL MAGNETIZATION [J].

THOLE, BT ;

CARRA, P ;

SETTE, F ;

VANDERLAAN, G .

PHYSICAL REVIEW LETTERS, 1992, 68 (12) :1943-1946

[29] ENHANCEMENT OF ORBITAL MAGNETISM AT SURFACES - CO ON CU(100) [J].

TISCHER, M ;

HJORTSTAM, O ;

ARVANITIS, D ;

DUNN, JH ;

MAY, F ;

BABERSCHKE, K ;

TRYGG, J ;

WILLS, JM ;

JOHANSSON, B ;

ERIKSSON, O .

PHYSICAL REVIEW LETTERS, 1995, 75 (08) :1602-1605

[30] Deposition of Fe clusters on Si surfaces [J].

Upward, MD ;

Cotier, BN ;

Moriarty, P ;

Beton, PH ;

Baker, SH ;

Binns, C ;

Edmonds, K .

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B, 2000, 18 (06) :2646-2649

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