Mechanical Characterization of Ruthenocuprates by Nanoindentation Technique


Alp U., Yilmaz F., Uzun O., Topal U., Ergen S., Kolemen U.

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM, vol.28, no.2, pp.519-523, 2015 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 28 Issue: 2
  • Publication Date: 2015
  • Doi Number: 10.1007/s10948-014-2799-2
  • Title of Journal : JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
  • Page Numbers: pp.519-523
  • Keywords: Ruthenocuprates, Powder metallurgy, Nanoindentation, Mechanical properties, POLYCRYSTALLINE SUPERCONDUCTORS, MAGNETIC-PROPERTIES, RUSR2RECU2O8 RE, HARDNESS, EU, TEMPERATURE, MODULUS, GD

Abstract

The nanomechanical properties of RuSr (2) RECu O-2(8) (RE = Eu, Gd and Ho) prepared by ammonium nitrate melt technique (ANMT) were investigated using nanoindentation technique. The indentation load-displacement curves of the samples were obtained at different peak loads ranging from 10 to 400 mN. Reduced elastic modulus and hardness of the superconductors calculated from loading-unloading curves were peak load dependent, i.e., indentation size effect (ISE). We observed that Ho substitution led to a substantial improvement in mechanical properties of the RuSr2RECu2O8, which was attributed to the strong grain connectivity and dense and less porous structure of RE = Ho sample.