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2014 | 126 | 1 | 256-257
Article title

Experimental Study of the Magnetocaloric Effect in the Two-Dimensional Quantum System Cu(tn)Cl_2

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EN
Abstracts
EN
Magnetocaloric studies of a two-dimensional antiferromagnet Cu(tn)Cl_{2} (tn=1,3-diaminopropane=C_3H_{10}N_2) have been performed by adiabatic magnetization and demagnetization measurements, in the temperature range from 0.2 to 4 K and magnetic fields up to 2 T. The compound represents an S=1/2 spatially anisotropic triangular-lattice antiferromagnet. The magnetocaloric measurements were focused at the identification of the phase transition to the magnetically ordered state which was not indicated in the previous specific heat studies. Furthermore, the interplay of the magnetic-field induced easy-plane anisotropy and the intrinsic spin anisotropy present in the studied system should manifest in low magnetic fields. The obtained results of the magnetocaloric experiments of Cu(tn)Cl_{2} indicate a double crossover from the normal to inverse magnetocaloric effect (MCE). The first crossover from the normal to inverse MCE occurring at about 0.3 K can be attributed to the competition of the aforementioned anisotropies. The second crossover from the inverse to normal MCE observed at about 2.2 K might be ascribed to the formation of spin vortices stabilized by the easy-plane anisotropy introduced by magnetic field.
Keywords
EN
Publisher

Year
Volume
126
Issue
1
Pages
256-257
Physical description
Dates
published
2014-07
Contributors
author
  • Institute of Construction, Technology and Management, Department of Applied Mathematics, Civil Engineering Faculty, Technical University of Košice, Vysokoškolská 4, 042 00 Košice, Slovakia
author
  • Institute of Physics, Faculty of Science, P.J. Šafárik University, Park Angelinum 9, 041 54 Košice, Slovakia
  • Institute of Physics, Faculty of Science, P.J. Šafárik University, Park Angelinum 9, 041 54 Košice, Slovakia
author
  • Institute of Physics, Faculty of Science, P.J. Šafárik University, Park Angelinum 9, 041 54 Košice, Slovakia
author
  • Institute of Experimental Physics of SAS, Watsonova 47, 040 01 Košice, Slovakia
author
  • Institute of Physics, Faculty of Science, P.J. Šafárik University, Park Angelinum 9, 041 54 Košice, Slovakia
References
  • [1] S. Sachdev, Nat. Phys 4, 173 (2008), doi: 10.1038/nphys894
  • [2] V. Zeleňák, A. Orendáčová, I. Čísařová, J. Černák, O.V. Kravchyna, J.-H. Park , M. Orendáč, A.G. Anders, A. Feher, M.W. Meisel, Inorg. Chem 45, 1774 (2006), doi: 10.1021/ic0516109
  • [3] A. Orendáčová, E. Čižmár, L. Sedláková, J. Hanko, M. Kajňaková, M. Orendáč, A. Feher, J.S. Xia, L. Yin, D.M. Pajerowski, M.W. Meisel, V. Zeleňák, S. Zvyagin, J. Wosnitza, Phys. Rev. B 80, 144418 (2009), doi: 10.1103/PhysRevB.80.144418
  • [4] R. Rawat, I. Das, Phys. Rev. B 64, 052407 (2001), doi: 10.1103/PhysRevB.64.052407
  • [5] L. Sedláková, Ph.D. Thesis, P.J. Šafárik University, Košice 2010
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv126n1123kz
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