Structural, calorimetric and magnetic properties study of the Cu0,91Fe0,09O system

H. D. Colorado, J. S.Trujillo Hernandez, G. A.Pérez Alcázar, Alberto Bolaños

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

In this work the Cu0.91Fe0.09O nanocrystalline system was prepared via the co-precipitation method. Using Mössbauer Spectrometry, X-Ray Diffraction, Vibrating Sample Magnetometry, Thermogravimetry and Differential Scanning Calorimetry, we study the magnetic behavior, and the structural and calorimetric properties of this system. X-ray diffraction shows only the presence of the CuO structural monoclinic phase, suggesting that Cu atoms are substituted by Fe ones. This hypothesis was confirmed by Mössbauer spectrometry at room temperature, because it shows that the spectrum is formed by two doublets, which correspond to Fe+ 2 and Fe+ 3 sites. Hysteresis cycles obtained by vibrating sample magnetometry detect a soft ferromagnetic behavior at room temperature with coercive fields between 8 and 20 Oe. At T = 20 K the sample shows a hard-magnetic behavior. The thermogravimetry results show a Néel temperature (TN > 440 °C). The differential scanning calorimetry curve show two endothermic peaks in the 90-120 °C range.

Original languageEnglish
Pages (from-to)171-178
Number of pages8
JournalHyperfine Interactions
Volume224
Issue number1-3
DOIs
StatePublished - 1 Jan 2014

Keywords

  • CuO
  • Mössbauer spectrometry
  • Vibrating sample magnetometry
  • X-ray diffraction

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