Quantized magnetization plateaux in the orthogonal dimer system SrCu2(BO3)2

H. Kageyama, Y. Narumi, K. Kindo, K. Onizuka, Y. Ueda, T. Goto

研究成果: Article査読

12 被引用数 (Scopus)

抄録

We carried out high-field magnetization measurements up to 57 T and down to 0.08 K on a single crystal of a two-dimensional spin-gap material SrCu2(BO3)2. We successfully observed the predicted plateau at 1/3 of the total magnetization around 50 T, in which the magnetic superstructure is characterized by a novel stripe order of excited triplets. The 1/3 plateau is stable over much wider field region than the previously observed 1/4 and 1/8 plateaux. A sharp jump in the magnetization between 1/3 and 1/4 plateaux may be associated with a first-order transition. Furthermore, several anomalous behaviors were observed in a lower-field region including field-direction dependent magnetizations around 30 T. The obtained magnetizations are compared with theoretical calculations based on a hard-core boson model and on a perturbation expansion method. The magnetization measurements were also performed on 1% zinc-doped single crystal.

本文言語English
ページ(範囲)177-182
ページ数6
ジャーナルJournal of Alloys and Compounds
317-318
DOI
出版ステータスPublished - 2001 4 12

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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