Heat Capacity Studies of NdNi_4Si Compound

• Authors: M. Falkowski , M. Reiffers , M. Zapotoková , A. Kowalczyk , T. Toliński , E. Gažo
• Languages of publication: EN

Abstracts

EN

The study of the heat capacity of the intermetallic compound NdNi_{4}Si including the effect of the magnetic field is reported. This compound crystallizes in the hexagonal CaCu_5-type structure, space group P6/mmm. NdNi_{4}Si is ferromagnetic with T_C = 8 K and the saturation magnetic moment of 1.5 μ_{B}/f.u. at 4.2 K (in H = 9 T). The heat capacity was analyzed considering the electronic contribution, the Schottky anomaly, and the lattice contributions in the frames of the Debye model. The scheme of the energy levels created by the crystal electric field split is determined from the Schottky contribution to the specific heat. NdNi_{4}Si was characterized by the electronic heat capacity coefficient γ = 85 mJ/(mol K^2) and the Debye temperature Θp_D = 325 K.

Keywords

EN

65.40.De; 65.40.gd; 71.20.Eh; 71.70.-d

Discipline

• 71.70.-d: Level splitting and interactions(see also 73.20.-r Surface and interface electron states; 75.30.Et Exchange and superexchange interactions)
• 71.20.Eh: Rare earth metals and alloys
• 65.40.De: Thermal expansion; thermomechanical effects
• 65.40.gd: Entropy

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2009
• Volume: 115
• Issue: 1
• Pages: 126-128

Dates

published

2009-01

Contributors

author

M. Falkowski

• Institute of Molecular Physics, Polish Academy of Sciences, M. Smoluchowskiego 17, 60-179 Poznań, Poland

author

M. Reiffers

• Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 043 53 Košice, Slovakia

author

M. Zapotoková

• Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 043 53 Košice, Slovakia

author

A. Kowalczyk

• Institute of Molecular Physics, Polish Academy of Sciences, M. Smoluchowskiego 17, 60-179 Poznań, Poland

author

T. Toliński

• Institute of Molecular Physics, Polish Academy of Sciences, M. Smoluchowskiego 17, 60-179 Poznań, Poland

author

E. Gažo

• Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 043 53 Košice, Slovakia

References

• 1. M. Falkowski, B. Andrzejewski, A. Kowalczyk, J. Alloys Comp. 442, 155 (2007)
• 2. W.E. Wallace, Rare Earth Intermetallics, Ed. A.M. Alper, J.L. Margrave, A.S. Nowick, Academic Press, New York 1973, p. 266
• 3. J.A. Blanco, D. Gignoux, D. Schmitt, A. Tari, F.Y. Zhang, J. Phys., Condens. Matter 6, 4335 (1994)
• 4. A. Kowalczyk, M. Falkowski, V.H. Tran, M. Pugaczowa-Michalska, J. Alloys Comp. 440, 13 (2007)
• 5. T. Toliński, W. Schäfer, W. Kockelmann, A. Kowalczyk, A. Hoser, Phys. Rev. B 68, 144403 (2003)
• 6. T. Toliński, W. Schäfer, A. Kowalczyk, B. Andrzejewski, A. Hoser, A. Szlaferek, J. Alloys Comp. 385, 28 (2004)
• 7. A. Tari, The Specific Heat of Master at Low Temperatures, Imperial College Press, London 2003, p. 150

Identifiers

DOI

10.12693/APhysPolA.115.126