Transitions in Sr2RuxIr1-xO4 compounds studied by the 99Ru mössbauer effect

Michael De Marco, David Graf, Job Rijssenbeek, R. J. Cava, D. Z. Wang, Y. Tu, Z. F. Ren, J. H. Wang, Michael Haka, Steve Toorongian, Michael J. Leone, Michael J. Naughton

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The 99Ru Mössbauer effect has been measured in the Sr2RuxIr1-xO4 system for x = 1.0, 0.7, 0.5, and 0.4 at 4.2 K. The isomer shift measurements show a change of -0.05(.02) mm/s as the compound changes from a metal (x = 0.7) to an insulator (x = 0.5). This isomer shift change is the electronic signature of the metal-insulator transition. All these spectra are single line. At x = 0.4 the compound undergoes a magnetic phase transition with the measurement of a hyperfine magnetic field of 7.2(1.5) T. The 99Ru Mössbauer effect has been measured from 1.8 to 147.5 K for Sr2RuO4 and from these measurements the Debye temperature was estimated to be 427(50) K.

Original languageEnglish (US)
Pages (from-to)7570-7574
Number of pages5
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number10
StatePublished - 1999

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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