A Mössbauer study of a Ge - Fe thin film

G. Y. Ahn; C. S. Kim; S. H. Lim

doi:10.1002/pssc.200777333

A Mössbauer study of a Ge - Fe thin film

G. Y. Ahn, C. S. Kim, S. H. Lim

Department of Materials Science and Engineering

Research output: Contribution to journal › Conference article › peer-review

Abstract

Magnetic phases of a Ge_48.2Fe_51.8 (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 language	English
Pages (from-to)	4449-4452
Number of pages	4
Journal	Physica Status Solidi (C) Current Topics in Solid State Physics
Volume	4
Issue number	12
DOIs	https://doi.org/10.1002/pssc.200777333
Publication status	Published - 2007
Event	International Symposium on Advanced Magnetic Materials and Appilications, (ISAMMA 2007) - Jeju, Korea, Republic of Duration: 2007 May 28 → 2007 Jun 1

ASJC Scopus subject areas

Condensed Matter Physics

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10.1002/pssc.200777333

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title = "A M{\"o}ssbauer study of a Ge - Fe thin film",

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 M{\"o}ssbauer 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 M{\"o}ssbauer 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.",

author = "Ahn, {G. Y.} and Kim, {C. S.} and Lim, {S. H.}",

year = "2007",

doi = "10.1002/pssc.200777333",

language = "English",

volume = "4",

pages = "4449--4452",

journal = "Physica Status Solidi (C) Current Topics in Solid State Physics",

issn = "1862-6351",

publisher = "Wiley-VCH Verlag",

number = "12",

note = "International Symposium on Advanced Magnetic Materials and Appilications, (ISAMMA 2007) ; Conference date: 28-05-2007 Through 01-06-2007",

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TY - JOUR

T1 - A Mössbauer study of a Ge - Fe thin film

AU - Ahn, G. Y.

AU - Kim, C. S.

AU - Lim, S. H.

PY - 2007

Y1 - 2007

N2 - 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.

AB - 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.

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DO - 10.1002/pssc.200777333

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EP - 4452

JO - Physica Status Solidi (C) Current Topics in Solid State Physics

JF - Physica Status Solidi (C) Current Topics in Solid State Physics

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T2 - International Symposium on Advanced Magnetic Materials and Appilications, (ISAMMA 2007)

Y2 - 28 May 2007 through 1 June 2007

ER -

A Mössbauer study of a Ge - Fe thin film

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