MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
Anomalous Magnetic Moments of Mn13 and Mn19 Clusters
Tina M. BriereMarcel H. F. SluiterVijay KumarYoshiyuki Kawazoe
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2002 Volume 43 Issue 3 Pages 424-427

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Abstract

Recently, sharply reduced magnetic moments were measured in Mn13 and Mn19 clusters with values of about 0.5 \\microB/atom, while other clusters had moments of 1 to 1.4 \\microB/atom. It was postulated that this sharply reduced magnetic moment results from the icosahedral growth sequence. We confirm the stability of the icosahedral structures. The icosahedral Mn13 and Mn19 clusters have several nearly degenerate low energy states, each with a low magnetic moment. It is shown that the mixture of ferromagnetic and antiferromagnetic coupling is responsible for the low net magnetic moments.

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© 2002 The Japan Institute of Metals and Materials
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