Reappearance of Antiferromagnetic Order in Nd0.9Ca0.1BaCo2O5+δ for δ>0.51 |
| J. Piętosa a, S. Kolesnik b, R. Puźniak a and B. Dabrowski b
aInstitute of Physics, Polish Academy of Sciences, al. Lotników 32/46, PL-02-668 Warsaw, Poland bDepartment of Physics, Northern Illinois University, De Kalb, IL 60115, USA |
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| The absence of the antiferromagnetic order in Nd0.9Ca0.1BaCo2O5.5 has been found to remain unchanged by applying a hydrostatic pressure of 10 kbar. In magnetic studies of polycrystalline Nd0.9Ca0.1BaCo2O5+δ (δ=0.07-0.69), we have found a reappearance of the antiferromagnetic phase, caused by an increase in oxygen index δ above 0.51 related to extra oxygen ions addition into the NdOδ plane. For the samples with δ=0.555 and 0.59, a coexistence of well developed antiferromagnetic phase with ferrimagnetic one is evidenced. |
DOI: 10.12693/APhysPolA.126.A-50 PACS numbers: 75.30.Kz, 75.50.Gg, 62.50.-p |