Alexander Barcza

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CoMnSi-based metamagnets CoMn 1−x Nix Si Magnetization M(H) of CoMn1−xNixSi at low temperatures M (Am 2 /kg) 140.0 120.0 100.0 80.0 60.0 40.0 20.0 330 K CoMn 0.93 Ni 0.07 Si 70 K 330 K 280 K 250 K 230 K 210 K 190 K 170 K 150 K 130 K 110 K 90 K 70 K 0.0 0 1 2 3 4 5 µ H (T) 0 sample was annealed at 950 ◦ C at low temperatures there are two regions where magnetization changes metamagnetic phase transition at ∼3 T Does the second phase have an influence on M(H)? A <strong>Barcza</strong>, K G Sandeman (DMG) CoMnSi-based magnetocaloric compounds 14th August 2007 17 / 27
CoMnSi-based metamagnets CoMn 1−x Nix Si Curie transitions above room temperature samples annealed at 850 ◦ C Ni (%) T C1 (K) 7 431 9 437 11 445 two transitions at temperatures above room temperature relative drop of magnetization above T C1 corresponds to the amount of second phase T C increases with Ni content A <strong>Barcza</strong>, K G Sandeman (DMG) CoMnSi-based magnetocaloric compounds 14th August 2007 18 / 27
Page 1 and 2: From Sensitivity to Tunability in C
Page 3 and 4: Why use Mn based alloys? Mn based c
Page 5 and 6: Inverse MCE in FeRh Kouvel J S J. A
Page 7 and 8: Introduction Thermodynamic quantiti
Page 9 and 10: CoMnSi-based metamagnets CoMnSi The
Page 11 and 12: CoMnSi-based metamagnets CoMnSi The
Page 13 and 14: CoMnSi-based metamagnets CoMnSi 1
Page 15 and 16: CoMn1−xNixSi - Aims CoMnSi-based
Page 17 and 18: CoMnSi-based metamagnets CoMn 1−x
Page 21: CoMnSi-based metamagnets CoMn 1−x
Page 27 and 28: Summary Summary and Outlook Samples
Page 29 and 30: Conclusion Conclusion and further w
Page 31 and 32: Appendix A Barcza, K G Sandeman (DM
Page 33: Appendix A Barcza, K G Sandeman (DM

Alexander Barcza

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