Felner, I. ; Hilscher, G. ; Michor, H. ; Wortmann, G. ; Dumschat, J. ; Awana, V. P. S. ; Malik, S. K. (1996) Structural and unique magnetic properties of PrBa2Fe3O8 Physical Review B, 54 (17). pp. 11999-12002. ISSN 0163-1829
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Official URL: http://prb.aps.org/abstract/PRB/v54/i17/p11999_1
Related URL: http://dx.doi.org/10.1103/PhysRevB.54.11999
Abstract
Tetragonal PrBa2Fe3O8 exhibits a unique magnetic behavior and behaves differently from both PrBa2Cu3O7 and all RBa2Fe3O8 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. Mossbauer studies reveal two inequivalent iron sites, which order antiferromagnetically at ~230 K, in contrast to 670 K in RBa2Fe3O8. X-ray absorption spectra indicate that Pr is trivalent. In contrast to PrBa2Cu3O7 [TN(Pr)=17 K] Pr in PrBa2Fe3O8 does not order magnetically. The anomalies at 23 and 55 K are probably related to spin reorientation of Fe moments.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Physical Society. |
| ID Code: | 23276 |
| Deposited On: | 25 Nov 2010 09:26 |
| Last Modified: | 06 Jun 2011 11:39 |
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