Neutron Scattering Study of Magnetic Excitations in the Spin S = 1 One-Dimensional Heisenberg Antiferromagnet Y2BaNiO5

Takehiro Sakaguchi; Kazuhisa Kakurai; Tetsuya Yokoo; Jun Akimitsu

doi:10.1143/JPSJ.65.3025

Neutron Scattering Study of Magnetic Excitations in the Spin S = 1 One-Dimensional Heisenberg Antiferromagnet Y₂BaNiO₅

Takehiro Sakaguchi, Kazuhisa Kakurai, Tetsuya Yokoo, Jun Akimitsu

Research output: Contribution to journal › Article › peer-review

74 Citations (Scopus)

Abstract

Magnetic excitations of the ideal one-dimensional, spin S = 1, antiferromagnet Y₂BaNiO₅ are studied by means of inelastic neutron scattering on single crystal sample. Our experimental results at low temperature indicate that Y₂BaNiO₅ can be regarded as the best isotropic Haldane-system sofar studied with the intrachain exchange energy J/k_B = -24.1meV and the averaged gap Δ(T = 7K) = 8.5meV. Y₂BaNiO₅ exhibits a good magnetic one-dimensionality with the inter-/intrachain exchange ratio of |J′ / J| ≤ 10^-4 and has only very small easy-axis and in-plane single ion anisotropy of |D/J| = 0.03 and |E/J| ∼ 0.01. In addition the temperature dependence of the Haldane gap Δ(T) and its damping rate was determined.

Original language	English
Pages (from-to)	3025-3031
Number of pages	7
Journal	journal of the physical society of japan
Volume	65
Issue number	9
DOIs	https://doi.org/10.1143/JPSJ.65.3025
Publication status	Published - Jan 1 1996
Externally published	Yes

Keywords

Haldane system
Low-dimensional magnetism
Neutron scattering

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.65.3025

Cite this

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title = "Neutron Scattering Study of Magnetic Excitations in the Spin S = 1 One-Dimensional Heisenberg Antiferromagnet Y2BaNiO5",

abstract = "Magnetic excitations of the ideal one-dimensional, spin S = 1, antiferromagnet Y2BaNiO5 are studied by means of inelastic neutron scattering on single crystal sample. Our experimental results at low temperature indicate that Y2BaNiO5 can be regarded as the best isotropic Haldane-system sofar studied with the intrachain exchange energy J/kB = -24.1meV and the averaged gap Δ(T = 7K) = 8.5meV. Y2BaNiO5 exhibits a good magnetic one-dimensionality with the inter-/intrachain exchange ratio of |J′ / J| ≤ 10-4 and has only very small easy-axis and in-plane single ion anisotropy of |D/J| = 0.03 and |E/J| ∼ 0.01. In addition the temperature dependence of the Haldane gap Δ(T) and its damping rate was determined.",

keywords = "Haldane system, Low-dimensional magnetism, Neutron scattering",

author = "Takehiro Sakaguchi and Kazuhisa Kakurai and Tetsuya Yokoo and Jun Akimitsu",

year = "1996",

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T1 - Neutron Scattering Study of Magnetic Excitations in the Spin S = 1 One-Dimensional Heisenberg Antiferromagnet Y2BaNiO5

AU - Sakaguchi, Takehiro

AU - Kakurai, Kazuhisa

AU - Yokoo, Tetsuya

AU - Akimitsu, Jun

PY - 1996/1/1

Y1 - 1996/1/1

N2 - Magnetic excitations of the ideal one-dimensional, spin S = 1, antiferromagnet Y2BaNiO5 are studied by means of inelastic neutron scattering on single crystal sample. Our experimental results at low temperature indicate that Y2BaNiO5 can be regarded as the best isotropic Haldane-system sofar studied with the intrachain exchange energy J/kB = -24.1meV and the averaged gap Δ(T = 7K) = 8.5meV. Y2BaNiO5 exhibits a good magnetic one-dimensionality with the inter-/intrachain exchange ratio of |J′ / J| ≤ 10-4 and has only very small easy-axis and in-plane single ion anisotropy of |D/J| = 0.03 and |E/J| ∼ 0.01. In addition the temperature dependence of the Haldane gap Δ(T) and its damping rate was determined.

AB - Magnetic excitations of the ideal one-dimensional, spin S = 1, antiferromagnet Y2BaNiO5 are studied by means of inelastic neutron scattering on single crystal sample. Our experimental results at low temperature indicate that Y2BaNiO5 can be regarded as the best isotropic Haldane-system sofar studied with the intrachain exchange energy J/kB = -24.1meV and the averaged gap Δ(T = 7K) = 8.5meV. Y2BaNiO5 exhibits a good magnetic one-dimensionality with the inter-/intrachain exchange ratio of |J′ / J| ≤ 10-4 and has only very small easy-axis and in-plane single ion anisotropy of |D/J| = 0.03 and |E/J| ∼ 0.01. In addition the temperature dependence of the Haldane gap Δ(T) and its damping rate was determined.

KW - Haldane system

KW - Low-dimensional magnetism

KW - Neutron scattering

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