Enhanced superparamagnetism in two-dimensional arrays of nanometer-sized Fe islands

K. R. Heim, G. G. Hembree, Kevin Schmidt, M. R. Scheinfein

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

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.

Original languageEnglish (US)
Pages (from-to)2878
Number of pages1
JournalApplied Physics Letters
Volume67
DOIs
StatePublished - 1995

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Monte Carlo method
moments
iron
room temperature

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Enhanced superparamagnetism in two-dimensional arrays of nanometer-sized Fe islands. / Heim, K. R.; Hembree, G. G.; Schmidt, Kevin; Scheinfein, M. R.

In: Applied Physics Letters, Vol. 67, 1995, p. 2878.

Research output: Contribution to journalArticle

Heim, K. R. ; Hembree, G. G. ; Schmidt, Kevin ; Scheinfein, M. R. / Enhanced superparamagnetism in two-dimensional arrays of nanometer-sized Fe islands. In: Applied Physics Letters. 1995 ; Vol. 67. pp. 2878.
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