Magnetic and structural studies of GdFe2-xHfx alloys

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Abstract

A series of GdFe2-xHfx alloys, where x=0, 0.1, 0.15, 0.2, and 0.3, have been prepared by arc-melting. X-ray diffraction (XRD) reveals that all the samples studied have the cubic Cu2Mg type structure. The lattice parameter (a) and the unit cell volume (V) are found to increase with increasing Hf concentration. The magnetization were measured in a superconducting quantum interference device magnetometer (SQUID) in the temperature range 5-300K. All samples under investigation are magnetically ordered at room temperature and at 5K and the saturation magnetization is found to increase with increasing the Hf concentration at both temperatures. The increase in the saturation magnetization is due to the replacement of magnetic Fe by non-magnetic Hf which reduces the Fe sublattice moment in the GdFe 2-xHfx ferromagnetic alloys. The Curie temperature (T c) is determined using vibrating sample magnetometer (VSM) for all samples and found to decrease linearly with increasing Hf concentration, from 800K for x=0-590K for x=0.3.

Original languageEnglish
Pages (from-to)31-33
Number of pages3
JournalJournal of Alloys and Compounds
Volume375
Issue number1-2
DOIs
Publication statusPublished - Jul 28 2004

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Keywords

  • Curie temperature
  • Lattice parameter
  • Magnetic measurements
  • Rare earth compounds
  • Saturation magnetization
  • Transition metal compounds

ASJC Scopus subject areas

  • Metals and Alloys

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