MAGNETISM FROM THE ATOM TO THE BULK IN IRON, COBALT, AND NICKEL CLUSTERS

被引：916

作者：

BILLAS, IML ^{[1
]}

CHATELAIN, A ^{[1
]}

DEHEER, WA ^{[1
]}

机构：

[1] ECOLE POLYTECH FED LAUSANNE,INST PHYS EXPTL,PHB ECUBLENS,CH-1015 LAUSANNE,SWITZERLAND

来源：

SCIENCE | 1994年 / 265卷 / 5179期

关键词：

D O I：

10.1126/science.265.5179.1682

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Molecular beam deflection measurements of small iron, cobalt, and nickel clusters show how magnetism develops as the cluster size is increased from several tens to several hundreds of atoms for temperatures between 80 and 1000 K. Ferromagnetism occurs even for the smallest sizes: for clusters with fewer than about 30 atoms the magnetic moments are atomlike; as the size is increased up to 700 atoms, the magnetic moments approach the bulk limit, with oscillations probably caused by surface-induced spin-density waves. The trends are explained in a magnetic shell model. A crystallographic phase transition from high moment to low moment in iron clusters has also been identified.

引用

页码：1682 / 1684

页数：3

共 30 条

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