Magnetocaloric Effect in Materials with the First Order Transitions - Direct Measurements

• Authors: J. Kamarád , J. Kaštil , Z. Arnold , P. Javorský , V. Sechovský
• Languages of publication: EN

Abstracts

EN

The results of direct measurements of the magneto-caloric characteristics Δ T_{ad} and the indirect determination of Δ S_{m} of pure Gd around the Curie temperature and of the FeMnP_{0.45}As_{0.55} and Ni_{45}Co_5Mn_{31}Ga_{19} intermetallics in the vicinity of the first order magnetic and structural phase transitions are presented and discussed. A pronounced temperature and field dependence of the first order transitions in the studied materials manifests restrictions applying these materials in magnetic refrigeration techniques. An effective use of the Ericsson and the Brayton refrigeration cycles with FeMnP_{0.45}As_{0.55} in the role of a refrigerant is discussed.

Keywords

EN

75.30.Sg; 75.30.Kz; 75.50.Cc

Discipline

• 75.30.Sg: Magnetocaloric effect, magnetic cooling(for cryogenics, see 07.20.Mc)
• 75.50.Cc: Other ferromagnetic metals and alloys
• 75.30.Kz: Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.)(for ferroelectric phase transitions, see 77.80.B-; for superconductivity phase diagrams, see 74.25.Dw)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2010
• Volume: 118
• Issue: 5
• Pages: 1000-1001

Dates

published

2010-11

Contributors

author

J. Kamarád

• Institute of Physics ASCR, v.v.i., Na Slovance 2, 182 21 Praha 8, Czech Republic

author

J. Kaštil

• Charles University in Prague, Faculty of Mathematics and Physics, Ke Karlovu 3, 121 16 Praha 2, Czech Republic

author

Z. Arnold

• Institute of Physics ASCR, v.v.i., Na Slovance 2, 182 21 Praha 8, Czech Republic

author

P. Javorský

• Charles University in Prague, Faculty of Mathematics and Physics, Ke Karlovu 3, 121 16 Praha 2, Czech Republic

author

V. Sechovský

• Charles University in Prague, Faculty of Mathematics and Physics, Ke Karlovu 3, 121 16 Praha 2, Czech Republic

References

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• 3. A.M. Tishin, Y.I. Spichkin, The Magnetocaloric Effect and its Applications, Institute of Physics Pub., Bristol 2003
• 4. V.K. Pecharsky, K.A. Gschneidner, Phys. Rev. Lett. 78, 4494 (1997)
• 5. V.K. Pecharsky, K.A. Gschneidner, Ya. Mudryk, D. Paudyal, J. Magn. Magn. Mater. 321, 3541 (2009)
• 6. O. Tegus, E. Brück, K.H.J. Buschow, F.R. de Boer, Nature 415, 150 (2002)
• 7. H. Wada, Y. Tanabe, Appl. Phys. Lett. 79, 3302 (2001)
• 8. F. Albertini, J. Kamarád, Z. Arnold, L. Pareti, E. Villa, L. Righi, J. Magn. Magn. Mater. 316, E35 (2007)

Identifiers

DOI

10.12693/APhysPolA.118.1000