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 I4 /amd, lattice parameters a=7.341(7) A, c=6.427(1) A 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 Neel 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 |
|---|---|
| Pages (from-to) | 115–118 |
| Journal | Journal of Alloys and Compounds |
| Volume | 323–324 |
| DOIs | |
| Publication status | Published - 2001 |
Keywords
- Magnetically ordered materials
- Chemical synthesis
- X-ray diffraction
- Exchange and superexchange
- Magnetic measurements
Research Beacons, Institutes and Platforms
- Advanced materials