Inverse Magnetocaloric Effect in Spin-1/2 Fisher's Super-Exchange Antiferromagnet

• Authors: L. Gálisová , J. Strečka
• Languages of publication: EN

Abstracts

EN

The isothermal entropy change and the adiabatic temperature change are rigorously calculated for the exactly solved spin-1/2 Fisher's super-exchange antiferromagnet in order to examine magnetocaloric properties of the model in a vicinity of the second-order phase transition. It is shown that the large inverse magnetocaloric effect occurs around the temperature interval T_c(h≠0) < T < T_c(h=0) for any magnetic-field change Δh:0 → h. The most pronounced inverse magnetocaloric effect can be found for the magnetic-field change, which coincides with the critical field of a zero-temperature phase transition from the antiferromagnetically ordered ground state to the paramagnetic one.

Keywords

EN

05.50.+q; 75.30.Et; 75.30.Sg; 75.30.Kz

Discipline

• 75.30.Et: Exchange and superexchange interactions(see also 71.70.Gm Exchange interactions)
• 75.30.Sg: Magnetocaloric effect, magnetic cooling(for cryogenics, see 07.20.Mc)
• 05.50.+q: Lattice theory and statistics (Ising, Potts, etc.)(see also 64.60.Cn Order-disorder transformations, and 75.10.Hk Classical spin models)
• 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)

• Journal: Acta Physica Polonica A
• Year: 2017
• Volume: 131
• Issue: 4
• Pages: 627-629

Dates

published

2017-04

Contributors

author

L. Gálisová

• Department of Applied Mathematics and Informatics, Faculty of Mechanical Engineering, Technical University, Letná 9, 042 00 Košice, Slovakia

author

J. Strečka

• Institute of Physics, Faculty of Sciences, P.J. Šafárik University, Park Angelinum 9, 041 54 Košice, Slovakia

References

• [1] A.M. Tishin, Y.I. Spichkin, The Magnetocaloric Effect and Its Applications, IOP Pub., Bristol 2003, doi: 10.1016/S1369-7021(03)01134-9
• [2] L. Gálisová, J. Strečka, Phys. Lett. A 379, 2474 (2015), doi: 10.1016/j.physleta.2015.07.007
• [3] Y. Hu, A. Du, J. Phys. Condens. Matter 20, 125225 (2008), doi: 10.1088/0953-8984/20/12/125225
• [4] M.E. Fisher, Proc. R. Soc. Lond. A 254, 66 (1960), doi: 10.1098/rspa.1960.0005
• [5] M.E. Fisher, Proc. R. Soc. Lond. A 256, 502 (1960), doi: 10.1098/rspa.1960.0122

Identifiers

DOI

10.12693/APhysPolA.131.627