Magnetic properties of sputtered Fe thin films

Processing and thickness dependence

Young-geun Kim, M. Oliveria

Research output: Contribution to journalArticle

52 Citations (Scopus)

Abstract

The microstructure and magnetic properties of polycrystalline Fe films with thicknesses of 200-1000 Å have been investigated. The films were prepared by rf sputtering onto SiO2 substrates. The investigation was prompted by the lack of data on sputtered Fe films in this thickness regime as well as disagreement in the data for evaporated films. In addition to thickness, substrate temperature and deposition pressure were varied to examine their effect on the microstructure. The film microstructure was characterized by x-ray diffraction, transmission electron microscopy, and Auger spectroscopy. The polycrystalline films did not display a strong preferred orientation and had average grain sizes of 60-85 Å. Surface oxide layers formed upon exposure to air ranged from 10 to 80 Å, the thicker oxides formed on films with lower density. Magnetic hysteresis measurements were made with a vibrating sample magnetometer. Below 1000 Å, porosity and surface oxidation result in reductions up to 25% in the saturation magnetization. An anomalous peak in coercivity at film thicknesses of 300-500 Å was observed, which can be explained by the change in domain wall type.

Original languageEnglish
Pages (from-to)1233-1241
Number of pages9
JournalJournal of Applied Physics
Volume74
Issue number2
DOIs
Publication statusPublished - 1993 Dec 1
Externally publishedYes

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magnetic properties
thin films
microstructure
oxides
magnetometers
Auger spectroscopy
coercivity
domain wall
x ray diffraction
film thickness
grain size
sputtering
hysteresis
porosity
saturation
magnetization
transmission electron microscopy
oxidation
air
temperature

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Magnetic properties of sputtered Fe thin films : Processing and thickness dependence. / Kim, Young-geun; Oliveria, M.

In: Journal of Applied Physics, Vol. 74, No. 2, 01.12.1993, p. 1233-1241.

Research output: Contribution to journalArticle

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