Thermodynamic Properties of Geometrically Frustrated S=1/2 XY Antiferromagnet Er_{2}Sn_{2}O_{7}

• Authors: N. Al Ghamdi , A. Orendáčová , V. Pavlík , M. Orendáč
• Languages of publication: EN

Abstracts

EN

The magnetic susceptibility, specific heat and entropy of geometrically frustrated S=1/2 XY antiferromagnet Er_{2}Sn_{2}O_{7} are reported. It is shown, that temperature dependence of magnetic susceptibility above nominally 10 K is governed by crystal field effects. Systematic study of specific heat in magnetic fields up to 7 T enabled the estimation of exchange coupling, J/k<<4.6 K. Investigation of isothermal change of magnetic entropy upon magnetization from 1 T to 7 T revealed the absence of enhanced magnetocaloric effect. The obtained results suggest that frustration parameter f ≈140 proposed for Er_{2}Sn_{2}O_{7} earlier may be significantly overestimated.

Keywords

EN

75.10.Dg; 75.50.Ee; 75.30.Sg

Discipline

• 75.50.Ee: Antiferromagnetics
• 75.30.Sg: Magnetocaloric effect, magnetic cooling(for cryogenics, see 07.20.Mc)
• 75.10.Dg: Crystal-field theory and spin Hamiltonians(see also 71.70.Ch Crystal and ligand fields)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2014
• Volume: 126
• Issue: 1
• Pages: 264-265

Dates

published

2014-07

Contributors

author

N. Al Ghamdi

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

author

A. Orendáčová

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

author

V. Pavlík

• Institute of Experimental Physics SAS, Watsonova 47, 040 01 Košice, Slovakia

author

M. Orendáč

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

References

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• [2] P.M. Sarte, H.J. Silverstein, B.T.K. van Wyk, J.S. Gardner, Y. Qiu, H.D. Zhou, C.R. Wiebe, J. Phys.: Condens. Matter 23, 382201 (2011), doi: 10.1088/0953-8984/23/38/382201
• [3] S.S. Sosin, L.A. Prozorova, M.R. Lees, G. Balakrishnan, O.A. Petrenko, Phys. Rev. B 82, 094428 (2010), doi: 10.1103/PhysRevB.82.094428
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Identifiers

DOI

10.12693/APhysPolA.126.264