Spin gaps in pseudo-one-dimensional RMn4Al8 compounds (R=Y, Ce and La)

C. J. Leavey; B. D. Rainford; J. R. Stewart; D. T. Adroja

doi:10.1016/j.jmmm.2006.10.233

Spin gaps in pseudo-one-dimensional RMn₄Al₈ compounds (R=Y, Ce and La)

C. J. Leavey, B. D. Rainford, J. R. Stewart, D. T. Adroja

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

5 Citations (Scopus)

Abstract

LaMn₄Al₈ displays large amplitude spin fluctuations arising from linear chains of Mn atoms. Inelastic neutron scattering data for LaMn₄Al₈ shows that the dynamical magnetic response has two components: a quasielastic component and a broad inelastic peak centred near 30 meV.YMn₄Al₈ and CeMn₄Al₈ display maxima in their susceptibilities near 500 and 300 K, respectively. This has been taken as evidence for the presence of a magnetic pseudogap in YMn₄Al₈, possibly arising from one-dimensional AF correlations. We report inelastic neutron scattering data for the weak magnetic response of both YMn₄Al₈ and CeMn₄Al₈. In YMn₄Al₈ a clear spin gap of order 27 meV is evident for a limited range of wavevectors. In CeMn₄Al₈ the gap formation is less obvious, being partly masked by the intermediate-valence response of the cerium.

Original language	English
Pages (from-to)	1041-1043
Number of pages	3
Journal	Journal of Magnetism and Magnetic Materials
Volume	310
Issue number	2 SUPPL. PART 2
DOIs	https://doi.org/10.1016/j.jmmm.2006.10.233
Publication status	Published - Mar 2007
Externally published	Yes

Keywords

CeMnAl
Inelastic neutron scattering
LaMnAl
Low dimensional magnetism
Spin dynamics
Spin fluctuations
YMnAl

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1016/j.jmmm.2006.10.233

Cite this

@article{cc93fcdfd3324a5592ac4abcafd3f047,

title = "Spin gaps in pseudo-one-dimensional RMn4Al8 compounds (R=Y, Ce and La)",

abstract = "LaMn4Al8 displays large amplitude spin fluctuations arising from linear chains of Mn atoms. Inelastic neutron scattering data for LaMn4Al8 shows that the dynamical magnetic response has two components: a quasielastic component and a broad inelastic peak centred near 30 meV.YMn4Al8 and CeMn4Al8 display maxima in their susceptibilities near 500 and 300 K, respectively. This has been taken as evidence for the presence of a magnetic pseudogap in YMn4Al8, possibly arising from one-dimensional AF correlations. We report inelastic neutron scattering data for the weak magnetic response of both YMn4Al8 and CeMn4Al8. In YMn4Al8 a clear spin gap of order 27 meV is evident for a limited range of wavevectors. In CeMn4Al8 the gap formation is less obvious, being partly masked by the intermediate-valence response of the cerium.",

keywords = "CeMnAl, Inelastic neutron scattering, LaMnAl, Low dimensional magnetism, Spin dynamics, Spin fluctuations, YMnAl",

author = "Leavey, {C. J.} and Rainford, {B. D.} and Stewart, {J. R.} and Adroja, {D. T.}",

year = "2007",

month = mar,

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language = "English",

volume = "310",

pages = "1041--1043",

journal = "Journal of Magnetism and Magnetic Materials",

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TY - JOUR

T1 - Spin gaps in pseudo-one-dimensional RMn4Al8 compounds (R=Y, Ce and La)

AU - Leavey, C. J.

AU - Rainford, B. D.

AU - Stewart, J. R.

AU - Adroja, D. T.

PY - 2007/3

Y1 - 2007/3

N2 - LaMn4Al8 displays large amplitude spin fluctuations arising from linear chains of Mn atoms. Inelastic neutron scattering data for LaMn4Al8 shows that the dynamical magnetic response has two components: a quasielastic component and a broad inelastic peak centred near 30 meV.YMn4Al8 and CeMn4Al8 display maxima in their susceptibilities near 500 and 300 K, respectively. This has been taken as evidence for the presence of a magnetic pseudogap in YMn4Al8, possibly arising from one-dimensional AF correlations. We report inelastic neutron scattering data for the weak magnetic response of both YMn4Al8 and CeMn4Al8. In YMn4Al8 a clear spin gap of order 27 meV is evident for a limited range of wavevectors. In CeMn4Al8 the gap formation is less obvious, being partly masked by the intermediate-valence response of the cerium.

AB - LaMn4Al8 displays large amplitude spin fluctuations arising from linear chains of Mn atoms. Inelastic neutron scattering data for LaMn4Al8 shows that the dynamical magnetic response has two components: a quasielastic component and a broad inelastic peak centred near 30 meV.YMn4Al8 and CeMn4Al8 display maxima in their susceptibilities near 500 and 300 K, respectively. This has been taken as evidence for the presence of a magnetic pseudogap in YMn4Al8, possibly arising from one-dimensional AF correlations. We report inelastic neutron scattering data for the weak magnetic response of both YMn4Al8 and CeMn4Al8. In YMn4Al8 a clear spin gap of order 27 meV is evident for a limited range of wavevectors. In CeMn4Al8 the gap formation is less obvious, being partly masked by the intermediate-valence response of the cerium.

KW - CeMnAl

KW - Inelastic neutron scattering

KW - LaMnAl

KW - Low dimensional magnetism

KW - Spin dynamics

KW - Spin fluctuations

KW - YMnAl

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DO - 10.1016/j.jmmm.2006.10.233

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JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

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