Hole Concentration in GdBaSrCu3-xZnxO7-δ System: Interplay among Superconductivity, Stripe Order and Pseudogap

Chong Tet Vui; Liow Chiew Han; Chuah Suan Cheng; Shiro Kambe; Roslan Abd Shukor

Authors

Chong Tet Vui Center for Plasma Research, INTI International University, Nilai, Negeri Sembilan, Malaysia
Liow Chiew Han CAE, INTI International University, Nilai, Negeri Sembilan, Malaysia
Chuah Suan Cheng Faculty of Business and Communication and Law, INTI International University, Putra Nilai, Negeri Sembilan, Malaysia
Shiro Kambe Graduate School of Science and Engineering, Yamagata University, Yonezawa City, Yamagata, Japan
Roslan Abd Shukor School of Applied Physics, Universiti Kebangsaan Malaysia, Selangor, Malaysia

Keywords:

Hole concentration, non-magnetic impurity, transition temperature

Abstract

Polycrystalline GdBaSrCu3O7-δ samples with Zn substitution were prepared via solid state
reaction. The superconducting properties of Zn substituted GdBaSrCu3O7-δ samples have been
studied by X-ray diffraction, resistivity, AC susceptibility and oxygen content measurements. Hole
concentration of these samples was determined according to the oxygen content measured by
iodometric titration method. Zn substitution doesn’t change the tetragonal structure of the sample
but reduces both Tc and hole concentration, which is attributed to hole filling by Zn. The nonmagnetic Zn2+ substitution have significant effects on the oxygen content and effective Cu valence
of these d-wave superconductors. The correlation between calculated hole concentration from
oxygen content data and Tc obtained leads to the possibly interplay among the superconducting
and stripe correlations in GdBaSrCu3-xZnxO7-δ samples.

Hole Concentration in GdBaSrCu3-xZnxO7-δ System: Interplay among Superconductivity, Stripe Order and Pseudogap

Authors

Keywords:

Abstract

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