A Mössbauer study of a Ge - Fe thin film

G. Y. Ahn, C. S. Kim, Sang Ho Lim

Research output: Contribution to journalArticle

Abstract

Magnetic phases of a Ge48.2Fe51.8 (in atomic %) thin film, fabricated by thermal co-evaporation onto an oxidized Si substrate, are analyzed by Mössbauer spectroscopy as well as magnetometry. Magnetic measurements indicate a superparamagnetic behavior due to the formation of Fe precipitates in an amorphous matrix with an average blocking temperature of 160 K and a spin glass behavior with a spin freezing temperature of 30 K. The superparamagnetic behavior is confirmed from the Mössbauer spectra taken at room temperature. The isomer-shift values indicate that the Fe atom in the amorphous phase is in the high-spin Fe3+ charge state.

Original languageEnglish
Pages (from-to)4449-4452
Number of pages4
JournalPhysica Status Solidi (C) Current Topics in Solid State Physics
Volume4
Issue number12
DOIs
Publication statusPublished - 2007 Dec 1

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magnetic measurement
thin films
spin glass
freezing
precipitates
isomers
evaporation
temperature
shift
room temperature
matrices
spectroscopy
atoms

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

A Mössbauer study of a Ge - Fe thin film. / Ahn, G. Y.; Kim, C. S.; Lim, Sang Ho.

In: Physica Status Solidi (C) Current Topics in Solid State Physics, Vol. 4, No. 12, 01.12.2007, p. 4449-4452.

Research output: Contribution to journalArticle

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