Dynamical response of nanoscale magnet in the environment with noise

Masamichi Nishino, Keiji Saito, Seiji Miyashita

Research output: Contribution to journalConference articlepeer-review


We have investigated the effect of noise on the energy gap of the quantum resonant tunneling. By the use of the Landau-Zener-Stückelberg formula, we estimate the tunneling gap of the two level system with S = 1/2 and also that of the lowest two levels in the realistic model with S = 10. As observed in the corresponding experiments, the estimated gap has no velocity dependence in fast sweeping field in both systems. We show that a correction for the estimated energy gap is necessary for the two level system with S = 1/2, while the effect of noise is negligible for the system with S = 10. We discuss the difference between both systems and also interpretation of the experimental data.

Original languageEnglish
Pages (from-to)1523-1526
Number of pages4
JournalJournal of Physics and Chemistry of Solids
Issue number6-8
Publication statusPublished - 2002 Jun
Externally publishedYes
EventProceedings of the 8th ISSP International Symposium - Tokyo, Japan
Duration: 2001 Nov 22001 Nov 5


  • A. Magnetic materials
  • D. Magnetic properties
  • D. Magnetic structure

ASJC Scopus subject areas

  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics


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