Novel Pr-Cu Magnetic Phase at Low Temperature in PrBa{sub 2}Cu{sub 3}O{sub 6{ital +x}} Observed by Neutron Diffraction

Journal Article · Wed Jan 01 04:00:00 EST 1997 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.78.130· OSTI ID:435246

Boothroyd, A; Longmore, A ^[1]; Andersen, N ^[2]; Brecht, E ^[3]; Wolf, T ^[4]

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1. Clarendon Laboratory, Oxford University, Oxford, OX1 3PU (United Kingdom)
2. Department of Solid State Physics, Riso/ National Laboratory, DK-4000 Roskilde (Denmark)
3. Forschungszentrum Karlsruhe, INFP, D-76021 Karlsruhe (Germany)
4. Forschungszentrum Karlsruhe, ITP, D-76021 Karlsruhe (Germany)

We have studied by neutron diffraction the magnetic ordering in Al-free crystals of PrBa{sub 2}Cu{sub 3}O{sub 6+x} (x=0.35 and 0.92) that do not display the AFII Cu magnetic phase. We find that the Pr ordering below 20K is accompanied by a counterrotation of the Cu antiferromagnetism on each plane of the bilayer. The maximum turn angle between the two planes is 60{degree}{plus_minus}9{degree} for the x=0.92 crystal, and 40{degree}{plus_minus}11{degree} for the x=0.35 crystal. This is the first observation of a noncollinear ordering of Cu moments in the bilayer, and is evidence for significant magnetic coupling between the Cu and Pr sublattices. {copyright} {ital 1996} {ital The American Physical Society}

• OSTI ID: 435246
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 1 Vol. 78; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANTIFERROMAGNETISM
BARIUM OXIDES
COPPER OXIDES
CRYSTAL STRUCTURE
MAGNETIC MOMENTS
NEUTRON DIFFRACTION
ORDER PARAMETERS
PHASE STUDIES
PRASEODYMIUM OXIDES