Structural and magnetic characterization of zircon-type PrCrO4 oxide

E. Jiménez, J. Isasi, R. Sáez-Puche*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

PrCrO4 has been synthesized as a single phase using oxidizing conditions, with a strong control on temperature and time. The zircon-type structure that this compound adopts has been refined from X-ray powder diffraction by the Rietveld method, showing tetragonal symmetry with space group I41/amd, lattice parameters a=7.341(7) Å, c=6.427(1) Å and Z=4. Magnetic susceptibility measurements in the temperature range of 1.9-300 K reveal the presence of incipient ferromagnetic interactions in the Cr5+ sublattice below 12 K. When the temperature decreases, the superexchange Pr3+-O-Cr5+-O-Pr3+ antiferromagnetic interactions become predominant, giving rise to a net maximum at lower temperatures. The estimated Néel temperature is field-dependent, taking the value of 9 K when the magnetic field strength is 50 Oe. The M vs. H plots, at 2 and 8 K, indicate the existence of a metamagnetic transition, having obtained a critical field as low as 399 and 149 Oe respectively at the temperatures mentioned above.

Original languageEnglish
Pages (from-to)115-118
Number of pages4
JournalJournal of Alloys and Compounds
Volume323-324
DOIs
Publication statusPublished - 12 Jul 2001

Bibliographical note

Funding Information:
We thank CICYT for financial support, under the project MAT-97-0697-C02-01.

Keywords

  • Chemical synthesis
  • Exchange and superexchange
  • Magnetic measurements
  • Magnetically ordered materials
  • X-ray diffraction

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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