Observation of a transient magnetization plateau in a quantum antiferromagnet on the Kagomé lattice

Y. Narumi, K. Katsumata, Z. Honda, J. C. Domenge, P. Sindzingre, C. Lhuillier, Y. Shimaoka, Tatsuo Kobayashi, K. Kindo

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Abstract

The magnetization process of an S = 1/2 antiferromagnet on the Kagomé lattice, [Cu3(titmb)2(OCOCH 3)6] · H2O{titmb = 1,3,5-tris(imidazol-1-ylmethyl)-2,4,6 trimethylbenzene}, has been measured at very low temperatures in both pulsed and steady fields. We have found a new dynamical behavior in the magnetization process. A plateau at one third of the saturation magnetization Ms appears in the pulsed-field experiments for intermediate sweep rates of the magnetic field and disappears in the steady-field experiments. A theoretical analysis using exact diagonalization yields J1 = -19 ± 2 K and J2 = 6 ± 2 K, for the nearest-neighbor and second-nearest-neighbor interactions, respectively. This set of exchange parameters explains the very low saturation field and the absence of the plateau in the thermodynamic equilibrium as well as the two-peak feature in the magnetic heat capacity observed by Honda et al (Z. Honda et al., J. Phys. Condens. Matter, 14 (2002) L625). Supported by numerical results we argue that a dynamical order by disorder phenomenon could explain the transient appearance of the Ms/3 plateau in pulsed-field experiments.

Original languageEnglish
Pages (from-to)705-711
Number of pages7
JournalEPL
Volume65
Issue number5
DOIs
Publication statusPublished - Mar 2004
Externally publishedYes

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plateaus
magnetization
saturation
thermodynamic equilibrium
imidazoles
specific heat
disorders
magnetic fields
interactions

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Narumi, Y., Katsumata, K., Honda, Z., Domenge, J. C., Sindzingre, P., Lhuillier, C., ... Kindo, K. (2004). Observation of a transient magnetization plateau in a quantum antiferromagnet on the Kagomé lattice. EPL, 65(5), 705-711. https://doi.org/10.1209/epl/i2003-10164-5

Observation of a transient magnetization plateau in a quantum antiferromagnet on the Kagomé lattice. / Narumi, Y.; Katsumata, K.; Honda, Z.; Domenge, J. C.; Sindzingre, P.; Lhuillier, C.; Shimaoka, Y.; Kobayashi, Tatsuo; Kindo, K.

In: EPL, Vol. 65, No. 5, 03.2004, p. 705-711.

Research output: Contribution to journalArticle

Narumi, Y, Katsumata, K, Honda, Z, Domenge, JC, Sindzingre, P, Lhuillier, C, Shimaoka, Y, Kobayashi, T & Kindo, K 2004, 'Observation of a transient magnetization plateau in a quantum antiferromagnet on the Kagomé lattice', EPL, vol. 65, no. 5, pp. 705-711. https://doi.org/10.1209/epl/i2003-10164-5
Narumi Y, Katsumata K, Honda Z, Domenge JC, Sindzingre P, Lhuillier C et al. Observation of a transient magnetization plateau in a quantum antiferromagnet on the Kagomé lattice. EPL. 2004 Mar;65(5):705-711. https://doi.org/10.1209/epl/i2003-10164-5
Narumi, Y. ; Katsumata, K. ; Honda, Z. ; Domenge, J. C. ; Sindzingre, P. ; Lhuillier, C. ; Shimaoka, Y. ; Kobayashi, Tatsuo ; Kindo, K. / Observation of a transient magnetization plateau in a quantum antiferromagnet on the Kagomé lattice. In: EPL. 2004 ; Vol. 65, No. 5. pp. 705-711.
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