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2008 | 113 | 1 | 473-476
Article title

Magnetocaloric Study of S=1/2 Low-Dimensional Heisenberg Antiferromagnet [Cu(phen)(H_2O)_2]SO_4

Content
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Languages of publication
EN
Abstracts
EN
We present the experimental study of magnetocaloric effect on powder sample [Cu(phen)(H_2O)_2]SO_4 (phen = phenantroline = C_{12}H_8N_2) in the temperature range from nominally 0.2 K to 4 K and in magnetic fields up to 2 T. The values of total entropy were extracted from the experimental data obtained by adiabatic demagnetization. The comparison was performed with the temperature dependence of the entropy for S=1/2 paramagnet calculated at selected magnetic fields. The deviations observed below 0.6 T were attributed to internal field mediated by exchange coupling. In addition, the temperature response observed in [Cu(phen)(H_2O)_2]SO_4 revealed very short relaxation time below 1 K. The comparison of the behavior observed at the end of the demagnetization in [Cu(phen)(H_2O)_2]SO_4 and other systems suggests that the magnetocaloric effect can serve as an alternative tool for studying slow magnetic relaxation.
Keywords
EN
Year
Volume
113
Issue
1
Pages
473-476
Physical description
Dates
published
2008-01
received
2007-07-09
References
  • 1. M.E. Zhitomirsky, Phys. Rev. B 67, 104421 (2003)
  • 2. M. Kajňaková, A. Orendáčová, M. Orendáč, J.-H. Park, O.V. Kravchyna, A.G. Anders, J. Černak, A. Feher, M.W. Meisel, J. Magn. Magn. Mater. 272, 867 (2004)
  • 3. A.A. Aligia, C.D. Batista, F.H.L. Eßler, Phys. Rev. B 62, 3259 (2000)
  • 4. D. De Klerk, Physica 12, 513 (1949)
  • 5. M. Orendáč, J. Hanko, E.Čižmar, A. Orendáčová, M. Shirai, S.T. Bramwell, Phys. Rev. B 75, 104425 (2007)
Document Type
Publication order reference
YADDA identifier
bwmeta1.element.bwnjournal-article-appv113n1116kz
Identifiers
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