Magnetic ground states of RMn4Al8, R = La, Pr, Y
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).
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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-μSR measurements that both LaMn4Al8 and the related compound PrMn4Al8 display antiferromagnetic order at low temperatures. In LaMn4Al8 the μSR 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.
|Keywords:||low-dimensional magnetism, LaMn4Al8, PrMn4Al8, μSR, magnetic order|
|Subjects:||Q Science > QC Physics|
|Divisions:||University Structure - Pre August 2011 > School of Physics and Astronomy
|Date Deposited:||13 Aug 2008|
|Last Modified:||01 Jun 2011 09:37|
|Contributors:||Rainford, B.D. (Author)
Leavey, C.J. (Author)
Hillier, A.D. (Author)
Stewart, J.R. (Author)
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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