Gd{sub 3+}-ESR and magnetic susceptibility of GdCu{sub 4}Al{sub 8} and GdMn{sub 4}Al{sub 8}

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

DOI:https://doi.org/10.1109/20.312425· OSTI ID:40210

Coldea, R; Coldea, M; Pop, I ^[1]

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1. Babes-Bolyai Univ., Cluj-Napoca (Romania). Dept. of Physics

Gd ESR of GdCu{sub 4}Al{sub 8} and GdMn{sub 4}Al{sub 8} and magnetic susceptibility of GdCu{sub 4}Al{sub 8}, GdMn{sub 4}Al{sub 8}, and YMn{sub 4}Al{sub 8} were measured in the temperature range of 290K--460K and 90K--1050K, respectively. The occurrence of the Mn moment in YMn{sub 4}Al{sub 8} and GdMn{sub 4}Al{sub 8} is strongly correlated with the critical value of d{approx}2.6{angstrom} of the Mn-Mn distance below which the Mn moment is not stable. The experimental data for GdMn{sub 4}Al{sub 8}, compared with the data for the isostructural compounds GdCu{sub 4}Al{sub 8} and YMn{sub 4}Al{sub 8}, show that near the critical value of d, the existence of Mn moment depends not only on the value of d, but also on the local magnetic surroundings. It has been revealed that the magnetic character of Mn moment in YMn{sub 4}Al{sub 8} and GdMn{sub 4}Al{sub 8} changes from an itinerant electron type to a local-moment type with increasing temperature.

• OSTI ID: 40210
• 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
ALUMINIUM ALLOYS
COPPER ALLOYS
ELECTRON SPIN RESONANCE
EXPERIMENTAL DATA
GADOLINIUM ALLOYS
GADOLINIUM IONS
INTERMETALLIC COMPOUNDS
MAGNETIC PROPERTIES