Abstract
Tetragonal (Formula presented)(Formula presented)(Formula presented) exhibits a unique magnetic behavior and behaves differently from both (Formula presented)(Formula presented)(Formula presented) and all R(Formula presented)(Formula presented)(Formula presented) materials. Magnetic-susceptibility study reveals two anomalies at 23 and 55 K which are sensitive to oxygen concentration, but no specific heat anomaly was observed at either temperature. Mössbauer studies reveal two inequivalent iron sites, which order antiferromagnetically at ≊230 K, in contrast to 670 K in R(Formula presented)(Formula presented)(Formula presented). X-ray absorption spectra indicate that Pr is trivalent. In contrast to (Formula presented)(Formula presented)(Formula presented) [(Formula presented)(Pr)=17 K] Pr in (Formula presented)(Formula presented)(Formula presented) does not order magnetically. The anomalies at 23 and 55 K are probably related to spin reorientation of Fe moments.
| Original language | English |
|---|---|
| Pages (from-to) | 11999-12002 |
| Number of pages | 4 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 54 |
| Issue number | 17 |
| DOIs | |
| State | Published - 1996 |
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