Observation of butterfly hysteresis loops in Ru dimer with large zero-field splitting

POSTER

Abstract

We present the magnetic characterization of a metal-metal bonded [Ru$_{2}$]$^{5+ }$dimer with S = 3/2 and a large zero-field splitting of +114 K. This large splitting yields an approximately isolated S = $\raise.5ex\hbox{$\scriptstyle 1$}\kern-.1em/ \kern-.15em\lower.25ex\hbox{$\scriptstyle 2$} $ state at low temperature. Field sweep rate dependent hysteresis loops yield unusual butterfly hysteresis loops which pass through a minimum with increasing field strength. This is attributed to a large phonon bottleneck effect.

Authors

  • Chris Ramsey

    • Dept. of Chemistry, Florida State University

  • F.A. Cotton

    • Dept. of Chemistry, Texas A\&M University

  • Wolfgang Wernsdorfer

    • Laboratoire Lois Neel, Grenoble, France

  • Irinel Chiorescu

    • National High Magnetic Field Laboratory, Tallahassee, FL

  • Naresh Dalal

    • Dept. of Chemistry, Florida State University