Structural and magnetic studies of 1% Ho

Gd0.99- xLax alloys

A. Rais, I. A. Al-Omari, M. S. Lataifeh

Research output: Contribution to journalArticle

Abstract

1% Ho:Gd0.99-xLax (x=0.1, 0.25, 0.4 and 0.5) alloys have been studied using X-ray diffraction (XRD), vibrating sample magnetometry (VSM) and Faraday magnetic susceptometry (FMS). XRD patterns show a single hexagonal type phase structure with lattice parameters depending on the Lanthanum concentration. VSM measurements were performed within the temperature range of 130-380 K and at maximum magnetic field of 13.5 kOe. FMS measurements were performed within the temperature range of 77-400 K and at magnetic field of 8 kOe. The sample with x=0.1 shows a ferromagnetic behavior up to a Curie temperature of 280 K whereas the three other samples are found to be paramagnetic within our temperature range of study. Furthermore, the saturation magnetization MS for sample x=0.1 decreases with increasing temperature and the estimated magnetic moment by extrapolation of MS versus T3/2 to T=0K is (6.15±0.05) μB/f.u. The reciprocal of the molar magnetic susceptibilities of all samples appear to obey Curie-Weiss law in the paramagnetic region.

Original languageEnglish
Pages (from-to)214-218
Number of pages5
JournalJournal of Magnetism and Magnetic Materials
Volume288
DOIs
Publication statusPublished - Mar 2005

Fingerprint

magnetic measurement
Magnetic fields
Lanthanum
X ray diffraction
Temperature
Magnetic variables measurement
Saturation magnetization
Phase structure
Curie temperature
Magnetic moments
Magnetic susceptibility
Extrapolation
Diffraction patterns
Lattice constants
Curie-Weiss law
temperature
lanthanum
magnetic fields
extrapolation
lattice parameters

Keywords

  • Curie temperature
  • Magnetic susceptibility
  • Saturation magnetization

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Structural and magnetic studies of 1% Ho : Gd0.99- xLax alloys. / Rais, A.; Al-Omari, I. A.; Lataifeh, M. S.

In: Journal of Magnetism and Magnetic Materials, Vol. 288, 03.2005, p. 214-218.

Research output: Contribution to journalArticle

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AB - 1% Ho:Gd0.99-xLax (x=0.1, 0.25, 0.4 and 0.5) alloys have been studied using X-ray diffraction (XRD), vibrating sample magnetometry (VSM) and Faraday magnetic susceptometry (FMS). XRD patterns show a single hexagonal type phase structure with lattice parameters depending on the Lanthanum concentration. VSM measurements were performed within the temperature range of 130-380 K and at maximum magnetic field of 13.5 kOe. FMS measurements were performed within the temperature range of 77-400 K and at magnetic field of 8 kOe. The sample with x=0.1 shows a ferromagnetic behavior up to a Curie temperature of 280 K whereas the three other samples are found to be paramagnetic within our temperature range of study. Furthermore, the saturation magnetization MS for sample x=0.1 decreases with increasing temperature and the estimated magnetic moment by extrapolation of MS versus T3/2 to T=0K is (6.15±0.05) μB/f.u. The reciprocal of the molar magnetic susceptibilities of all samples appear to obey Curie-Weiss law in the paramagnetic region.

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