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
Full Text PDF
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