Alexander Barcza
Alexander Barcza
Alexander Barcza
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CoMnSi-based metamagnets CoMn 1−x Nix Si<br />
A metastable high temperature hexagonal phase<br />
amount of second phase:<br />
weight fraction of hexagonal Phase (%)<br />
24<br />
22<br />
20<br />
18<br />
16<br />
14<br />
12<br />
10<br />
8<br />
6<br />
4<br />
2<br />
Annealing temperature<br />
1100 °C<br />
950 °C<br />
850 °C<br />
0<br />
6 8 10 12<br />
degree of Ni substitution (%)<br />
unit cell volume:<br />
147.4<br />
6 8 10 12<br />
degree of Ni substitution (%)<br />
annealing at a temperature below Tstruc for a long time<br />
(200 h) decreases the weight fraction of second phase<br />
samples annealed away from Tstruc show similar<br />
behaviour of unit cell volume versus Ni concentration<br />
orthorhombic unit cell volume (Å 3 )<br />
A <strong>Barcza</strong>, K G Sandeman (DMG) CoMnSi-based magnetocaloric compounds 14th August 2007 16 / 27<br />
147.9<br />
147.8<br />
147.7<br />
147.6<br />
147.5<br />
Annealing temperature<br />
1100 °C<br />
950 °C<br />
850 °C (Si powder)
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