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Magnetic phase transition in UAu1.1Ga2.5

✍ Scribed by Z. Z̊ołnierek; T. Plackowski; D. Włosewicz; K. Rogacki; A.J. Zaleski; J. Janczak

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
579 KB
Volume
192
Category
Article
ISSN
0921-4526

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✦ Synopsis

A polycrystalline

LJAu, ,Ga, 5 compound of 14/mmm symmetry, being the structural analogue of ThCr,Siz. was examined by means of magnetic and specific heat methods.

A transition to the antiferromagnetic state observed at T, = 4X K in x,,c and xAC measurements is confirmed by the C, data which show an additional peak at 45 K. Analysis of '+ the C,(T) function indicates the presence of a U ion with a magnetic doublet as the ground state. A low y value of 9.5 ? 6.3 mJ/K* mol points out a good localisation of the 5f level. A C, step equal to about 2R and some short-range effects can be understood in the framework of the Bethe-Peierls-Weiss approach to the Ising s = l/2 system.

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