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 language | English |
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Pages (from-to) | 115-118 |
Number of pages | 4 |
Journal | Journal of Alloys and Compounds |
Volume | 323-324 |
DOIs | |
Publication status | Published - 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