The role of a critical distance in RMn{sub 2} compounds

Journal Article · Tue Mar 01 04:00:00 EST 1994 · IEEE Transactions on Magnetics

DOI:https://doi.org/10.1109/20.312249· OSTI ID:40207

Kim-Ngan, N H; Brommer, P E; Franse, J J.M. ^[1]

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1. Univ. van Amsterdam (Netherlands). Van der Walls-Zeeman Lab.

In the RMn{sub 2} system, the antiferromagnetically ordered Mn moments are reported to disappear at a reduction of the Mn-Mn distance, either by applying external pressure or by alloying. The authors illustrate the phenomena for the hexagonal NdMn{sub 2} compound. The Neel temperature in the (Nd,Lu)Mn{sub 2} system is found to vanish at substitution of 30% of Nd by Lu, considered to be equivalent to applying a pressure of 24.5kbar. Antiferromagnetic order of the Mn sublattice, however, vanishes already at substitution of 7% of Mn by Cu and of 3% of Mn by Fe in the NdMn{sub 2}, being equivalent to an external pressure of only 4kbar. High-pressure studies on the Nd(Mn,Cu){sub 2} system show that the effect of an external pressure on the Neel temperature decreases markedly with increasing Cu concentration, in contrast to what is expected in a critical distance model.

• OSTI ID: 40207
• Report Number(s): CONF-930860--
• Journal Information: IEEE Transactions on Magnetics, Journal Name: IEEE Transactions on Magnetics Journal Issue: 2Pt2 Vol. 30; ISSN IEMGAQ; ISSN 0018-9464
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CRYSTAL LATTICES
CRYSTAL STRUCTURE
INTERATOMIC DISTANCES
INTERMETALLIC COMPOUNDS
LUTETIUM ALLOYS
MAGNETIC MOMENTS
MAGNETIC PROPERTIES
MANGANESE ALLOYS
NEODYMIUM ALLOYS
ORDER PARAMETERS
PRESSURE DEPENDENCE