Spin Dynamics in an Ordered Stripe Phase

Journal Article · Mon Sep 01 04:00:00 EDT 1997 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.79.2133· OSTI ID:560733

Tranquada, J M; Wochner, P ^[1]; Buttrey, D J ^[2]

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1. Physics Department, Brookhaven National Laboratory, Upton, New York 11973 (United States)
2. Department of Chemical Engineering, University of Delaware, Newark, Delaware 19716 (United States)

Inelastic neutron scattering has been used to measure the low-energy spin excitations in the ordered charge-stripe phase of La{sub 2}NiO{sub 4+{delta}} with {delta}=0.133 . Spin-wave-like excitations disperse away from the incommensurate magnetic superlattice points with a velocity {approximately}60{percent} of that in the {delta}=0 compound. Incommensurate inelastic peaks remain well resolved up to at least twice the magnetic ordering temperature. Paramagnetic scattering from a {delta}=0.105 sample, which has a N{acute e}el-ordered ground state, shows anomalies suggestive of incipient stripe correlations. Similarities between these results and measurements on superconducting cuprates are discussed. {copyright} {ital 1997} {ital The American Physical Society}

• Research Organization: Brookhaven National Laboratory
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 560733
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 11 Vol. 79; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
66 PHYSICS
DISPERSION RELATIONS
INELASTIC SCATTERING
INTERSTITIALS
LANTHANUM OXIDES
MAGNETIC MOMENTS
NEUTRON DIFFRACTION
NICKEL OXIDES
SPIN WAVES