Experimental Study of Magnetocaloric Effect in Dipolar Magnet KEr(MoO_4)_2

• Authors: J. Hanko , M. Orendáč , M. Kajňaková , A. Orendáčová , A. Feher
• Languages of publication: EN

Abstracts

EN

We report on magnetothermodynamic properties of single crystal KEr(MoO_4)_2 which were investigated from nominally 0.4 K to 20 K in magnetic fields up to 4 T. Using the available specific heat data the diagram of temperature and magnetic field dependence of the total entropy was constructed. Predictions for temperature dependences of the relative temperature variations during the adiabatic demagnetization and the entropy variation during the isothermal demagnetization were calculated from the specific heat data. The obtained results suggest that unlike common refrigerants, in KEr(MoO_4)_2 the quantities describing magnetic cooling remain nearly constant in the temperature range 2-10 K.

Keywords

EN

75.30.Sg; 75.50.Ee

Discipline

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

• Journal: Acta Physica Polonica A
• Year: 2008
• Volume: 113
• Issue: 1
• Pages: 465-468

Dates

published

2008-01

received

2007-07-09

Contributors

author

J. Hanko

• Centre of Low-Temperature Physics of Slovak Academy of Sciences, and P.J.Šafárik University, Park Angelinum 9, 041 54 Košice, Slovakia

author

M. Orendáč

• Centre of Low-Temperature Physics of Slovak Academy of Sciences, and P.J.Šafárik University, Park Angelinum 9, 041 54 Košice, Slovakia

author

M. Kajňaková

• Centre of Low-Temperature Physics of Slovak Academy of Sciences, and P.J.Šafárik University, Park Angelinum 9, 041 54 Košice, Slovakia

author

A. Orendáčová

• Centre of Low-Temperature Physics of Slovak Academy of Sciences, and P.J.Šafárik University, Park Angelinum 9, 041 54 Košice, Slovakia

author

A. Feher

• Centre of Low-Temperature Physics of Slovak Academy of Sciences, and P.J.Šafárik University, Park Angelinum 9, 041 54 Košice, Slovakia

References

• 1. A. Honecker, S. Wessel, Physica B 378-380, 1098 (2006) and references therein
• 2. A. Orendáčová, D. Horváth, M. Orendáč, E.Čižmár, M. Kačmár, V. Bondarenko, A. Anders, A. Feher, Phys. Rev. B 65, 014420 (2002)
• 3. S. Riegel, G. Weber, J. Phys E, Sci Instrum. 19, 790 (1986)
• 4. M. Evangelisti, A. Candini, A. Ghirri, M. Affronte, E.K. Brechin, E.J.L. McInnes, Appl. Phys. Lett. 87, 072504 (2005)

Identifiers

DOI

10.12693/APhysPolA.113.465