ISSN:
1573-7357
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract Magnetic measurement and powder X-ray Rietveld analysis are performed on oxygenated Pr 1.5 Ba 1.5 Cu 3 O 7.2 cuprate. This tetragonal compound with lattice parameters a = 0.38916 nm and c = 1.16177 nm is found to form the TlBa 2 CaCu 2 O 7 1212-type structure when written as Cu[Ba 1.5 Pr 0.5 ]PrCu 2 O 7.2. Low temperature magnetic data indicate that anomalous Pr order temperature T N (Pr) decreases from 18 K for orthorhombic PrBa 2 Cu 3 O 6.9 to 10.5 K for Pr 1.5 Ba 1.5 Cu 3 O 7.2. The increasing Pr-O bond length with decreasing T N indicates that Pr ordering is closely correlated with the wave function overlap between Pr-4f orbital and O-2p π orbital in the CuO 2 bi-layers.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1022546723142
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