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Spin dynamics of 3d heavy fermion compound LaMn4Al8

Spin dynamics of 3d heavy fermion compound LaMn4Al8
Spin dynamics of 3d heavy fermion compound LaMn4Al8
Yamasaki et al. have suggested that LaMn4Al8 is a nearly antiferromagnetic metal with linear chains of Mn atoms. The Sommerfeld constant for LaMn4Al8 ?=265 mJ/mol K2 is comparable to values found in other 3d heavy fermions such as (YSc)Mn2 and ?-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.
spin dynamics, 3d heavy fermion, inelastic neutron scattering
0921-4526
675-676
Leavey, C.J.
036b92b8-f811-4ae2-b541-8f1e2cf20d99
Rainford, B.D.
a57f1153-bbba-49a3-bffc-0d96087156a0
Stewart, J.R.
696842e4-4156-4018-af01-b71320976c13
Adroja, D.T.
8eaa8fab-9acb-420b-af27-918d6fd01a70
Leavey, C.J.
036b92b8-f811-4ae2-b541-8f1e2cf20d99
Rainford, B.D.
a57f1153-bbba-49a3-bffc-0d96087156a0
Stewart, J.R.
696842e4-4156-4018-af01-b71320976c13
Adroja, D.T.
8eaa8fab-9acb-420b-af27-918d6fd01a70

Leavey, C.J., Rainford, B.D., Stewart, J.R. and Adroja, D.T. (2006) Spin dynamics of 3d heavy fermion compound LaMn4Al8. Physica B: Condensed Matter, 378-380, 675-676. (doi:10.1016/j.physb.2006.01.189).

Record type: Article

Abstract

Yamasaki et al. have suggested that LaMn4Al8 is a nearly antiferromagnetic metal with linear chains of Mn atoms. The Sommerfeld constant for LaMn4Al8 ?=265 mJ/mol K2 is comparable to values found in other 3d heavy fermions such as (YSc)Mn2 and ?-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.

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More information

Published date: 2006
Keywords: spin dynamics, 3d heavy fermion, inelastic neutron scattering

Identifiers

Local EPrints ID: 57419
URI: http://eprints.soton.ac.uk/id/eprint/57419
ISSN: 0921-4526
PURE UUID: 408bf9af-d5ce-4dfb-b6d6-20aa00a506c6

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Date deposited: 13 Aug 2008
Last modified: 15 Mar 2024 11:06

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Contributors

Author: C.J. Leavey
Author: B.D. Rainford
Author: J.R. Stewart
Author: D.T. Adroja

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