Magnetic properties of YMn{sub x}Al{sub 12{minus}x}(x = 4,5,6)

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

DOI:https://doi.org/10.1109/20.312426· OSTI ID:40211

Coldea, M; Coldea, R; Borodi, G ^[1]

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

Magnetic susceptibility of YMn{sub x}Al{sub 12{minus}x} (x=4,5,6) with ThMn{sub 12} structure was measured at temperatures 90K to 900K. These compounds show varied magnetic behaviors depending upon the relative abundance of Mn atoms in the 8f, 8j and 8i crystallographic sites. In the high temperature range, the temperature dependence of the susceptibility is of the Curie-Weiss type. The occurrence of a Mn moment in YMn{sub 4}Al{sub 8} and YMn{sub 8}Al{sub 6} is strongly correlated with the critical value d{approx}2.6{angstrom} of MD-Mn distance below which the Mn moment collapses. In YMn{sub 8}Al{sub 6} both the magnetic and the nonmagnetic Mn atoms were observed to coexist. It has been revealed that the magnetic character of Mn moment in the 8f sites of these two compounds changes from an itinerant electron type to a local moment type with increasing temperature. A transition to a spin glass state at low temperatures for YMn{sub 5}Al{sub 7}, was suggested.

• OSTI ID: 40211
• 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
CRYSTAL STRUCTURE
EXPERIMENTAL DATA
MAGNETIC MOMENTS
MAGNETIC PROPERTIES
MANGANESE ALLOYS
YTTRIUM ALLOYS