Magnetic properties of Fe-Ag multilayers with varying layer thickness and bilayer number

Research output: Contribution to journalArticle

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Abstract

Fe-Ag multilayers were prepared by vacuum evaporation in a wide range of Fe and Ag thicknesses (tFe, tAg) and bilayer numbers (n), while the magnetic properties as a function of these parameters were measured. Samples with discontinuous Fe layers are superparamagnetic (SPM) and our paper shows that tAg and n affect the superparamagnetic blocking temperature (TB) not only by affecting the interactions between the Fe grains but also through influencing the growth process of Fe and thereby modifying the magnetic-grain-size distribution. A magnetic "phase diagram" of our Fe-Ag multilayers is constructed in the tFe, tAg, n parameter space, where the SPM and ferromagnetic behaviors are separated by a mixed zone showing the characteristics of both. The measured trend of the susceptibilities attained at the blocking temperature (TB), increasing with increasing TB, was explained by the volume distribution of the magnetic particles, as illustrated by calculations for an ensemble of interaction-free magnetic particles.

Original languageEnglish
Article number144423
JournalPhysical Review B
Volume98
Issue number14
DOIs
Publication statusPublished - Oct 15 2018

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Magnetic properties
Multilayers
magnetic properties
Vacuum evaporation
Phase diagrams
grain size
phase diagrams
evaporation
interactions
magnetic permeability
trends
Temperature
vacuum
temperature

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Magnetic properties of Fe-Ag multilayers with varying layer thickness and bilayer number. / Kiss, L.; Balogh, J.; Bujdosó, L.; Kaptás, D.

In: Physical Review B, Vol. 98, No. 14, 144423, 15.10.2018.

Research output: Contribution to journalArticle

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