ENHANCED SUPERPARAMAGNETISM IN 2-DIMENSIONAL ARRAYS OF NANOMETER-SIZED FE ISLANDS

被引：15

作者：

HEIM, KR ^{[1
]}

HEMBREE, GG ^{[1
]}

SCHMIDT, KE ^{[1
]}

SCHEINFEIN, MR ^{[1
]}

机构：

[1] ARIZONA STATE UNIV,DEPT PHYS & ASTRON,TEMPE,AZ 85287

来源：

APPLIED PHYSICS LETTERS | 1995年 / 67卷 / 19期

关键词：

D O I：

10.1063/1.114815

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Iron grown on room-temperature CaF2/Si(111) substrates form two-dimensional arrays of nanometer-sized superparamagnetic islands. Deposition of Ag on the Fe/CaF2/Si(111) produced a superparamagnetic response where the effective moment was proportional to the number of Fe islands covered by an average-sized Ag island. The nonmagnetic Ag overlayer mediates a long-range exchange between neighboring Fe islands within an individual Ag island. Monte Carlo methods are used to examine ordering in two dimensions and to set minimum interisland coupling strengths. (C) 1995 American Institute of Physics.

引用

页码：2878 / 2880

页数：3

共 17 条

[1]

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[2] ULTRAHIGH-VACUUM SCANNING ELECTRON-MICROSCOPY CHARACTERIZATION OF THE GROWTH OF FE ON CAF2/SI(111) - SELECTIVE NUCLEATION ON ELECTRON-BEAM MODIFIED SURFACES [J].