Alexander Barcza
Alexander Barcza
Alexander Barcza
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CoMnSi-based metamagnets CoMnSi<br />
The metamagnet – CoMnSi<br />
sample was quenched from 1000 ◦ C<br />
60.0<br />
M (Am 2 /kg)<br />
50.0<br />
40.0<br />
30.0<br />
20.0<br />
10.0<br />
4000 Oe<br />
0.0<br />
100 200 300 400 500 600<br />
T (K)<br />
Bińczycka et al., phys. stat. sol. (a) 35 K69 (1976)<br />
Johnson et al., phys. stat. sol (a) 20 331 (1973)<br />
Nizioł et al., phys. stat. sol. (a) 45 591 (1978)<br />
There are 3 phase transitions in CoMnSi<br />
antiferro- to ferromagnetic<br />
(metamagnetic) phase transition<br />
at Tt = 200 − 360 K,<br />
ferro- to paramagnetic phase<br />
transition at T C 410 K,<br />
orthorhombic to hexagonal<br />
structural phase transition at<br />
Tstructural = 917 ◦ C.<br />
! phase transition temperatures are very<br />
sample dependent !<br />
A <strong>Barcza</strong>, K G Sandeman (DMG) CoMnSi-based magnetocaloric compounds 14th August 2007 8 / 27
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