Long-range magnetic order of the Er ions in Er{sub 2}Ba{sub 4}Cu{sub 7}O{sub 14.92}

Journal Article · Thu May 01 04:00:00 EDT 1997 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.55.R12005· OSTI ID:496780

Boettger, G; Fischer, P ^[1]; Doenni, A ^[2]; Berastegui, P ^[3]; Aoki, Y; Sato, H ^[4]; Fauth, F ^[1]

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1. Laboratory for Neutron Scattering, Eidgenoessische Technische Hochschule Zuerich and Paul Scherrer Institut, CH-5232 Villigen PSI (Switzerland)
2. National Research Institute for Metals, Tsukuba, Ibaraki 305 (Japan)
3. ISIS Facility, Rutherford Appleton Laboratory, Didcot, Oxon OX11 0QX (United Kingdom)
4. Department of Physics, Faculty of Science, Tokyo Metropolitan University, Hachioji-shi 192-03 (Japan)

Neutron-diffraction investigations at temperatures down to 25 mK were performed for the high-temperature superconductor Er{sub 2}Ba{sub 4}Cu{sub 7}O{sub 14.92} (Er-247), T{sub c}=89 K on a polycrystalline sample prepared by a sol-gel technique. Below T{sub N}=0.54 K, a three-dimensional antiferromagnetic ordering of the Er ions corresponding to a propagation vector {bold k}=(1/2,0,0) and a finite correlation length of about 130 {Angstrom} along the c axis have been found. The magnetic Er moments are oriented parallel to the b axis. This work proves that Er-247 shows a long-range magnetic ordering. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 496780
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 18 Vol. 55; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ANTIFERROMAGNETISM
BARIUM OXIDES
COPPER OXIDES
ERBIUM OXIDES
HIGH-TC SUPERCONDUCTORS
NEUTRON DIFFRACTION
POLYCRYSTALS
TEMPERATURE RANGE 0000-0013 K