Spin glass behaviour in a new ternary intermetallic, U 3 Fe 4+x Al 12-x A.P. Gonçalves 1 , O. Tougait 2 , H. Noël 2 1 Departamento de Química, Instituto Tecnológico e Nuclear/CFMC-UL, Sacavém, Portugal 5 Sciences Chimiques de Rennes, Laboratoire de Chimie du Solide et Matériaux. UMR CNRS 6226, Université de Rennes 1, Avenue de Général Leclerc, 35042 Rennes, France
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Spin glass behaviour in a new ternary intermetallic, U 3 Fe 4+x Al 12-x A.P. Gonçalves 1, O. Tougait 2, H. Noël 2 1 Departamento de Química, Instituto.
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Spin glass behaviour in a new ternary intermetallic, U3Fe4+xAl12-x
A.P. Gonçalves1, O. Tougait2, H. Noël2
1Departamento de Química, Instituto Tecnológico e Nuclear/CFMC-UL, Sacavém, Portugal
5 Sciences Chimiques de Rennes, Laboratoire de Chimie du Solide et Matériaux. UMR CNRS 6226, Université de Rennes 1, Avenue de Général Leclerc, 35042 Rennes,
France
Outline
•Introduction
•Experimental
•Crystal structure
•Magnetic properties
•Conclusions
•Phase equilibrium study of U-Fe-Al
Introduction
0.0 0.2 0.4 0.6 0.8 1.0
0.0
0.2
0.4
0.6
0.8
1.00.0
0.2
0.4
0.6
0.8
1.0
FeAl3Fe2Al5
FeAl2
UAl3
AlU
Fe
UFe
Al
L
L
UAl2
UFe2
FeAl
1
2
34
56
78
9
(1) UFe2Al10
(2) U2Fe4Al13
(3) UAl2-xFex
(4) U3Fe4+xAl12-x
(5) UFexAl12-x
(6) U2Fe17 xAlx
(7) UFe1+xAl1-x
(8) U2Fe12Al5
(9) UFe2-xAlx
R
•U3Fe4+xAl12-x crystallizes in the Gd3Ru4Al12 structure type
ab
cPowderCell 2.0
U atoms form a distorted Kagome net
a
b
cPowderCell 2.0
Good candidate for spin glass due to geometrical frustration.
a
b
cPowderCell 2.0
?
• Samples prepared by arc-melting/annealing (850ºC, 2 weeks);
• Analyzed by powder XRD and Observed by SEM;
• Characterized by ac-susceptibility (30-10000 Hz, 1-500 Oe) and magnetization (ZFC/FC, 0-7 T) measurements between 2-300 K;