Evidence of a field-induced ordering in YbCo2Zn20 in a [111] magnetic field

Yasuyuki Shimura, Toshiro Sakakibara, Shingo Yoshiuchi, Fuminori Honda, Rikio Settai, Yoshichika ÖNuki

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DC magnetization (M) measurements were done on a single crystal of YbCo2Zn20 at very low temperatures (T) down to 0.07K in magnetic fields H || [111]. In addition to the metamagnetic behavior at μ0Hm = 0.6 T already known, we found a new metamagnetic transition at μ0H'm = 6 T whose critical field moves to higher fields with increasing T. Moreover, in fields above 6 T, temperature dependence of the magnetization M(T) shows a kink below 0.6 K. These anomalies indicate the presence of a new field-induced ordered phase. In addition, a broad peak is observed in M(T) in fields above 3 T outside the ordered phase. These results are best explained by a level crossing of the low-lying crystalline-electric-field state with the ground state, possibly assisted by a valence change in magnetic fields.

Original languageEnglish
Article number073707
Journaljournal of the physical society of japan
Issue number7
Publication statusPublished - Jul 2011
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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