Effect of Si Substitution and Annealing on Magnetocaloric Properties in TbCo_2

• Authors: M. Janatova , J. Poltierova Vejpravova , P. Javorsky , J. Prokleska , P. Svoboda , S. Danis
• Languages of publication: EN

Abstracts

EN

We report on magnetocaloric properties of the as-cast and annealed TbCo_2 with partial substitution of cobalt by silicon. The samples were characterized by powder X-ray diffraction and investigated by heat capacity measurements (8-300 K, in fields 0 T and 1 T). TbCo_2 undergoes a second-order type phase transition at T_C = 240 K, from paramagnetic to ferrimagnetic state;similar behavior was revealed in the Si-doped compounds. The temperature dependence of magnetic entropy and the corresponding magnetocaloric effect were derived for all studied samples. The influence of the heat treatment and Si doping on magnetocaloric properties will be discussed in context of the analogue case Er(Co_{1-x}Si_x)_2.

Keywords

EN

65.40.Gd; 75.30.Sg

Discipline

• 75.30.Sg: Magnetocaloric effect, magnetic cooling(for cryogenics, see 07.20.Mc)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2008
• Volume: 113
• Issue: 1
• Pages: 311-314

Dates

published

2008-01

received

2007-07-09

Contributors

author

M. Janatova

• Charles University Prague, Faculty of Mathematics and Physics, DCMP, Ke Karlovu 5, 121 16 Prague 2, Czech Republic

author

J. Poltierova Vejpravova

• Charles University Prague, Faculty of Mathematics and Physics, DCMP, Ke Karlovu 5, 121 16 Prague 2, Czech Republic

author

P. Javorsky

• Charles University Prague, Faculty of Mathematics and Physics, DCMP, Ke Karlovu 5, 121 16 Prague 2, Czech Republic

author

J. Prokleska

• Charles University Prague, Faculty of Mathematics and Physics, DCMP, Ke Karlovu 5, 121 16 Prague 2, Czech Republic

author

P. Svoboda

• Charles University Prague, Faculty of Mathematics and Physics, DCMP, Ke Karlovu 5, 121 16 Prague 2, Czech Republic

author

S. Danis

• Charles University Prague, Faculty of Mathematics and Physics, DCMP, Ke Karlovu 5, 121 16 Prague 2, Czech Republic

References

• 1. E. Warburg, Ann. Phys. (Leipzig), 13, 1441 (1881)
• 2. V.K. Pecharsky, K.A. Gschneider Jr., J. Magn. Magn. Mater. 200, 44 (1999)
• 3. D. Vasylyev, J. Prokleska, J. Sebek, V. Sechovsky, J. Alloys Comp. 394, 96 (2005)
• 4. D. Gignoux, F. Givord, F. Sayetat, J. Magn. Magn. Mater. 15-18, 1235 (1980)
• 5. N.H. Duc, D.T. Kim Anh, J. Magn. Magn. Mater. 242-245, 873 (2002)

Identifiers

DOI

10.12693/APhysPolA.113.311