Singlet-triplet crossover in the two-dimensional dimer spin system YbAl3C3

Shunichiro Kittaka, Tomoyoshi Sugiyama, Yasuyuki Shimura, Toshiro Sakakibara, Saori Matsuda, Akira Ochiai

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1 Citation (Scopus)

Abstract

Low-temperature magnetization (M) measurements down to 0.1 K have been performed in magnetic fields up to 14.5 T for a single piece of a tiny single-crystalline sample (∼0.2 mg weight) of the spin-gap system YbAl3C3. At the base temperature of 0.1 K, several metamagnetic transitions were clearly observed for H {norm of matrix} c in the range 6 T < μ 0 H < 9 T whereas only two transitions were observed, one at 4.8 T and the other at 6.6 T, for H {norm of matrix} a. At fields above 9 T, the magnetization becomes almost saturated for both H {norm of matrix} a and H {norm of matrix} c. The present results indicate that a singlet-triplet crossover occurs in a relatively narrow field range, suggesting a rather weak interdimer interaction in spite of the nearly triangular lattice of Yb ions.

Original languageEnglish
Pages (from-to)2088-2092
Number of pages5
JournalJournal of the Korean Physical Society
Volume62
Issue number12
DOIs
Publication statusPublished - 2013 Jul

Keywords

  • Dimer
  • Magnetization
  • Spin gap
  • YbAlC

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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