External magnetic field effect on helical configurations

E. Rastelli, A. Tassi, G. Melegari, Alberto Pimpinelli

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


An external magnetic field induces first-order helix-fan phase transition only if the spin-spin turn angle Q is lesser than π/2, while the helix is distorted continously by the field into the saturated paramagnetic phase when Q>π/2. Our calculation is valid for a generic value of the field and our conclusion is in contrast with previous expectations based on low-field-high-field expansion of the zero-temperature energy of the planar model.

Original languageEnglish (US)
Pages (from-to)173-174
Number of pages2
JournalJournal of Magnetism and Magnetic Materials
Issue numberPART 1
StatePublished - Feb 2 1992

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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