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Magnetic ground states of RMn4Al8, R = La, Pr, Y

Magnetic ground states of RMn4Al8, R = La, Pr, Y
Magnetic ground states of RMn4Al8, R = La, Pr, Y
Yamasaki et al. (Solid State Commun. 119 (2001) 415) have suggested that LaMn4Al8 is a nearly antiferromagnetic metal with linear chains of Mn atoms. We present evidence from ZF-?SR measurements that both LaMn4Al8 and the related compound PrMn4Al8 display antiferromagnetic order at low temperatures. In LaMn4Al8 the ?SR relaxation rate rises to a peak at 4.5 K; below this temperature the asymmetry decreases smoothly. In PrMn4Al8 well-defined oscillations appear below 35 K. Neutron crystal field spectroscopy suggests a singlet ground state for the Pr3+ ion, so it is likely that the internal field seen by the muons arises from ordered Mn moments. YMn4Al8 shows no sign of magnetic correlations down to 1.2 K.
low-dimensional magnetism, LaMn4Al8, PrMn4Al8, ?SR, magnetic order
0921-4526
929-931
Rainford, B.D.
a57f1153-bbba-49a3-bffc-0d96087156a0
Leavey, C.J.
036b92b8-f811-4ae2-b541-8f1e2cf20d99
Hillier, A.D.
89e88dd9-6b7a-4b1d-a399-99b5bc301e9a
Stewart, J.R.
696842e4-4156-4018-af01-b71320976c13
Rainford, B.D.
a57f1153-bbba-49a3-bffc-0d96087156a0
Leavey, C.J.
036b92b8-f811-4ae2-b541-8f1e2cf20d99
Hillier, A.D.
89e88dd9-6b7a-4b1d-a399-99b5bc301e9a
Stewart, J.R.
696842e4-4156-4018-af01-b71320976c13

Rainford, B.D., Leavey, C.J., Hillier, A.D. and Stewart, J.R. (2005) Magnetic ground states of RMn4Al8, R = La, Pr, Y. Physica B: Condensed Matter, 359, 929-931. (doi:10.1016/j.physb.2005.01.266).

Record type: Article

Abstract

Yamasaki et al. (Solid State Commun. 119 (2001) 415) have suggested that LaMn4Al8 is a nearly antiferromagnetic metal with linear chains of Mn atoms. We present evidence from ZF-?SR measurements that both LaMn4Al8 and the related compound PrMn4Al8 display antiferromagnetic order at low temperatures. In LaMn4Al8 the ?SR relaxation rate rises to a peak at 4.5 K; below this temperature the asymmetry decreases smoothly. In PrMn4Al8 well-defined oscillations appear below 35 K. Neutron crystal field spectroscopy suggests a singlet ground state for the Pr3+ ion, so it is likely that the internal field seen by the muons arises from ordered Mn moments. YMn4Al8 shows no sign of magnetic correlations down to 1.2 K.

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More information

Published date: 2005
Keywords: low-dimensional magnetism, LaMn4Al8, PrMn4Al8, ?SR, magnetic order

Identifiers

Local EPrints ID: 57565
URI: http://eprints.soton.ac.uk/id/eprint/57565
ISSN: 0921-4526
PURE UUID: 2716139f-973f-4698-a008-623c33668fdb

Catalogue record

Date deposited: 13 Aug 2008
Last modified: 13 Mar 2019 20:33

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