Mössbauer studies of GdFe2-xHfx alloys

Research output: Contribution to journalArticle

Abstract

GdFe2-xHfx alloys, where x = 0, 0.10, 0.15, 0.20, and 0.30, are produced by arc-melting of pure elements. The samples are investigated by x-ray diffraction and Fe57 Mössbauer spectroscopy at 78 K and 300 K. We find that the alloy system GdFe2-xHfx have the single phase cubic Cu2Mg type structure in the whole concentration range. Mössbauer spectroscopic results show that all the samples studied are magnetically ordered at 78 K, and at room temperature. The room temperature spectra are fitted with two magnetic components where the direction of magnetization is along the [111] while the spectra at 78 K are fitted with four magnetic subspectra indicating a complex direction of magnetization for all samples under investigation. The average magnetic hyperfine field and the average isomer shift are found to decrease almost linearly with increasing the Hf concentration at 78 K and 300 K due to the replacement of Fe by nonmagnetic Hf.

Original languageEnglish
Pages (from-to)93-100
Number of pages8
JournalHyperfine Interactions
Volume187
Issue number1-3
DOIs
Publication statusPublished - 2008

Fingerprint

Magnetization
Isomers
arc melting
magnetization
Melting
Diffraction
Spectroscopy
room temperature
Magnetic fields
X rays
Temperature
x ray diffraction
isomers
shift
spectroscopy
Direction compound

Keywords

  • Hyperfine field
  • Isomer shift
  • Second order Doppler shift

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Nuclear and High Energy Physics
  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry

Cite this

Mössbauer studies of GdFe2-xHfx alloys. / Al-Omari, I. A.; Gismelseed, A.; Widatallah, H.; Elzain, M.; Al-Rawas, A.; Yousif, A.

In: Hyperfine Interactions, Vol. 187, No. 1-3, 2008, p. 93-100.

Research output: Contribution to journalArticle

@article{b4858aaf1bd9426b9154819759c0fa9f,
title = "M{\"o}ssbauer studies of GdFe2-xHfx alloys",
abstract = "GdFe2-xHfx alloys, where x = 0, 0.10, 0.15, 0.20, and 0.30, are produced by arc-melting of pure elements. The samples are investigated by x-ray diffraction and Fe57 M{\"o}ssbauer spectroscopy at 78 K and 300 K. We find that the alloy system GdFe2-xHfx have the single phase cubic Cu2Mg type structure in the whole concentration range. M{\"o}ssbauer spectroscopic results show that all the samples studied are magnetically ordered at 78 K, and at room temperature. The room temperature spectra are fitted with two magnetic components where the direction of magnetization is along the [111] while the spectra at 78 K are fitted with four magnetic subspectra indicating a complex direction of magnetization for all samples under investigation. The average magnetic hyperfine field and the average isomer shift are found to decrease almost linearly with increasing the Hf concentration at 78 K and 300 K due to the replacement of Fe by nonmagnetic Hf.",
keywords = "Hyperfine field, Isomer shift, Second order Doppler shift",
author = "Al-Omari, {I. A.} and A. Gismelseed and H. Widatallah and M. Elzain and A. Al-Rawas and A. Yousif",
year = "2008",
doi = "10.1007/s10751-008-9883-6",
language = "English",
volume = "187",
pages = "93--100",
journal = "Hyperfine Interaction",
issn = "0304-3843",
publisher = "Springer Netherlands",
number = "1-3",

}

TY - JOUR

T1 - Mössbauer studies of GdFe2-xHfx alloys

AU - Al-Omari, I. A.

AU - Gismelseed, A.

AU - Widatallah, H.

AU - Elzain, M.

AU - Al-Rawas, A.

AU - Yousif, A.

PY - 2008

Y1 - 2008

N2 - GdFe2-xHfx alloys, where x = 0, 0.10, 0.15, 0.20, and 0.30, are produced by arc-melting of pure elements. The samples are investigated by x-ray diffraction and Fe57 Mössbauer spectroscopy at 78 K and 300 K. We find that the alloy system GdFe2-xHfx have the single phase cubic Cu2Mg type structure in the whole concentration range. Mössbauer spectroscopic results show that all the samples studied are magnetically ordered at 78 K, and at room temperature. The room temperature spectra are fitted with two magnetic components where the direction of magnetization is along the [111] while the spectra at 78 K are fitted with four magnetic subspectra indicating a complex direction of magnetization for all samples under investigation. The average magnetic hyperfine field and the average isomer shift are found to decrease almost linearly with increasing the Hf concentration at 78 K and 300 K due to the replacement of Fe by nonmagnetic Hf.

AB - GdFe2-xHfx alloys, where x = 0, 0.10, 0.15, 0.20, and 0.30, are produced by arc-melting of pure elements. The samples are investigated by x-ray diffraction and Fe57 Mössbauer spectroscopy at 78 K and 300 K. We find that the alloy system GdFe2-xHfx have the single phase cubic Cu2Mg type structure in the whole concentration range. Mössbauer spectroscopic results show that all the samples studied are magnetically ordered at 78 K, and at room temperature. The room temperature spectra are fitted with two magnetic components where the direction of magnetization is along the [111] while the spectra at 78 K are fitted with four magnetic subspectra indicating a complex direction of magnetization for all samples under investigation. The average magnetic hyperfine field and the average isomer shift are found to decrease almost linearly with increasing the Hf concentration at 78 K and 300 K due to the replacement of Fe by nonmagnetic Hf.

KW - Hyperfine field

KW - Isomer shift

KW - Second order Doppler shift

UR - http://www.scopus.com/inward/record.url?scp=70350074059&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=70350074059&partnerID=8YFLogxK

U2 - 10.1007/s10751-008-9883-6

DO - 10.1007/s10751-008-9883-6

M3 - Article

VL - 187

SP - 93

EP - 100

JO - Hyperfine Interaction

JF - Hyperfine Interaction

SN - 0304-3843

IS - 1-3

ER -