Magnetic ordering, spin waves, and Haldane-gap excitations in (Nd{sub x}Y{sub 1{minus}x}){sub 2}BaNiO{sub 5} linear-chain mixed-spin antiferromagnets

Journal Article · Tue Dec 01 04:00:00 EST 1998 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.58.14424· OSTI ID:670224

Yokoo, T; Raymond, S; Zheludev, A; Maslov, S ^[1]; Ressouche, E ^[2]; Zaliznyak, I; Erwin, R ^[3]; Nakamura, M; Akimitsu, J ^[4]

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1. Physics Department, Brookhaven National Laboratory, Upton, New York 11973 (United States)
2. DRFMC/SPSMS/MDN Centre dEtudes Nucleaires, 17 rue des Martyrs, 38054 Grenoble Cedex (France)
3. NIST Center for Neutron Research, National Institute of Standards and Technology, Maryland 20899 (United States)
4. Department of Physics, Aoyama-Gakuin University, 6-16-1, Chitosedai, Setagaya-ku Tokyo 157 (Japan)

Linear-chain nickelates with the composition (Nd{sub x}Y{sub 1{minus}x}){sub 2}BaNiO{sub 5} (x=1, x=0.75, x=0.5, and x=0.25) are studied in a series of neutron-scattering experiments. Powder diffraction is used to determine the temperature dependence of the magnetic structure in all four systems. Single-crystal inelastic neutron scattering is employed to investigate the temperature dependence of the Haldane-gap excitations and low-energy spin waves in the x=1 compound Nd{sub 2}BaNiO{sub 5}. The results of these experiments are discussed in the context of the {open_quotes}Haldane chain in a staggered field{close_quotes} model for R{sub 2}BaNiO{sub 5} systems, and quantitative agreement with theory is obtained. {copyright} {ital 1998} {ital The American Physical Society}

• OSTI ID: 670224
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 21 Vol. 58; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANTIFERROMAGNETIC MATERIALS
ANTIFERROMAGNETISM
BARIUM OXIDES
EXCITATION
MAGNETIC PROPERTIES
NEODYMIUM COMPOUNDS
NEODYMIUM OXIDES
NEUTRON DIFFRACTION
NICKEL OXIDES
SPIN WAVES
YTTRIUM COMPOUNDS
YTTRIUM OXIDES