Critical phenomena in helical magnet β-MnO2: X-ray magnetic scattering study

Hirohiko Sato, Yoichi Kawamura, Toshiyuki Ogawa, Youichi Murakami, Hiroyuki Ohsumi, Masaichiro Mizumaki, Naoshi Ikeda

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


It has been theoretically expected that critical phenomena of helimagnetism is drastically different from those of collinear antiferromagnetism due to the existence of chiral degree of freedom. In order to verify this prediction, we carried out X-ray magnetic scattering measurements on a simplest helimagnet β-MnO2 using a synchrotron radiation. The critical exponent β was estimated at 0.25 ± 0.05 from the temperature dependence of the scattering intensity. This value is consistent with the predicted value 0.253 for chiral system rather than with 0.346 for collinear system.

Original languageEnglish
Pages (from-to)757-758
Number of pages2
JournalPhysica B: Condensed Matter
Issue numberII
Publication statusPublished - May 2003
Externally publishedYes


  • Critical phenomena
  • Helical magnetism
  • Manganese oxides
  • X-ray magnetic scattering

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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