Spin fluctuations in the (Nd,Lu)Mn{sub 2} system

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

DOI:https://doi.org/10.1109/20.312245· OSTI ID:40214

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

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

Using Grueneisen relations for the thermal expansion and the specific beat of (Nd,Lu)Mn{sub 2} compounds, the authors succeeded in defining separate contributions, ascribed to electron excitations, lattice contributions and crystal-field effects in the Nd sublattice, with Grueneisen parameters {Gamma}{sub e} = 3.5, {Gamma}{sub ph} = 0.7 and {Gamma}{sub Nd} = {minus}3.0, respectively. After subtracting these contributions from the measured specific beat and thermal expansion, they applied the same analysis to the remaining part, ascribed to the Mn sublattice. In this way, the authors identified a spin-fluctuation contribution and a contribution ascribed to the antiferromagnetic ordering of `local` Mn moments. The latter contribution disappears at substitution of 30% of Nd by Lu. The spin fluctuation contribution is found in the complete concentration range of the Nd{sub 1{minus}x}Lu{sub x}Mn{sub 2} compounds.

• OSTI ID: 40214
• 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
ANTIFERROMAGNETISM
DATA ANALYSIS
GRUENEISEN CONSTANT
INTERMETALLIC COMPOUNDS
LUTETIUM
LUTETIUM ALLOYS
MAGNETIC MOMENTS
MANGANESE ALLOYS
METALLURGICAL EFFECTS
NEODYMIUM ALLOYS