Spin dynamics of 3d heavy fermion compound LaMn4Al8

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

doi:10.1016/j.physb.2006.01.189

Spin dynamics of 3d heavy fermion compound LaMn₄Al₈

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

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

5 Citations (Scopus)

Abstract

Yamasaki et al. have suggested that LaMn₄Al₈ is a nearly antiferromagnetic metal with linear chains of Mn atoms. The Sommerfeld constant for LaMn₄Al₈ γ=265 mJ/mol K² is comparable to values found in other 3d heavy fermions such as (YSc)Mn₂ and β-Mn. We have shown that LaMn₄Al₈ displays antiferromagnetic order below 15 K. Here we present inelastic neutron scattering data on LaMn₄Al₈. The magnetic scattering in LaMn₄Al₈ has two components: a broad inelastic response centred near 30 meV and a narrower quasielastic response whose width and weight change with temperature. We attribute the latter to near-critical spin fluctuations.

Original language	English
Pages (from-to)	675-676
Number of pages	2
Journal	Physica B: Condensed Matter
Volume	378-380
Issue number	SPEC. ISS.
DOIs	https://doi.org/10.1016/j.physb.2006.01.189
Publication status	Published - 1 May 2006
Externally published	Yes

Keywords

3d heavy fermion
Inelastic neutron scattering
Spin dynamics

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

Access to Document

10.1016/j.physb.2006.01.189

Cite this

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title = "Spin dynamics of 3d heavy fermion compound LaMn4Al8",

abstract = "Yamasaki et al. have suggested that LaMn4Al8 is a nearly antiferromagnetic metal with linear chains of Mn atoms. The Sommerfeld constant for LaMn4Al8 γ=265 mJ/mol K2 is comparable to values found in other 3d heavy fermions such as (YSc)Mn2 and β-Mn. We have shown that LaMn4Al8 displays antiferromagnetic order below 15 K. Here we present inelastic neutron scattering data on LaMn4Al8. The magnetic scattering in LaMn4Al8 has two components: a broad inelastic response centred near 30 meV and a narrower quasielastic response whose width and weight change with temperature. We attribute the latter to near-critical spin fluctuations.",

keywords = "3d heavy fermion, Inelastic neutron scattering, Spin dynamics",

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

year = "2006",

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language = "English",

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TY - JOUR

T1 - Spin dynamics of 3d heavy fermion compound LaMn4Al8

AU - Leavey, C. J.

AU - Rainford, B. D.

AU - Stewart, J. R.

AU - Adroja, D. T.

PY - 2006/5/1

Y1 - 2006/5/1

N2 - Yamasaki et al. have suggested that LaMn4Al8 is a nearly antiferromagnetic metal with linear chains of Mn atoms. The Sommerfeld constant for LaMn4Al8 γ=265 mJ/mol K2 is comparable to values found in other 3d heavy fermions such as (YSc)Mn2 and β-Mn. We have shown that LaMn4Al8 displays antiferromagnetic order below 15 K. Here we present inelastic neutron scattering data on LaMn4Al8. The magnetic scattering in LaMn4Al8 has two components: a broad inelastic response centred near 30 meV and a narrower quasielastic response whose width and weight change with temperature. We attribute the latter to near-critical spin fluctuations.

AB - Yamasaki et al. have suggested that LaMn4Al8 is a nearly antiferromagnetic metal with linear chains of Mn atoms. The Sommerfeld constant for LaMn4Al8 γ=265 mJ/mol K2 is comparable to values found in other 3d heavy fermions such as (YSc)Mn2 and β-Mn. We have shown that LaMn4Al8 displays antiferromagnetic order below 15 K. Here we present inelastic neutron scattering data on LaMn4Al8. The magnetic scattering in LaMn4Al8 has two components: a broad inelastic response centred near 30 meV and a narrower quasielastic response whose width and weight change with temperature. We attribute the latter to near-critical spin fluctuations.

KW - 3d heavy fermion

KW - Inelastic neutron scattering

KW - Spin dynamics

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DO - 10.1016/j.physb.2006.01.189

M3 - Article

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SN - 0921-4526

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JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

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