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

  

Tet Vui CHONG1*, Chiew Han LIOW2, Suan Cheng CHUAH3, Shiro KAMBE4 and Roslan ABD-SHUKOR5

 

1CAE, Center for Plasma Research, INTI International University, Persiaran Perdana BBN, Putra Nilai, 71800 Nilai, Negeri Sembilan, Malaysia

2CAE, INTI International University, Persiaran Perdana BBN, Putra Nilai, 71800 Nilai, Negeri Sembilan, Malaysia

3FOBCAL, INTI International University, Persiaran Perdana BBN, Putra Nilai, 71800 Nilai, Negeri Sembilan, Malaysia

4Graduate School of Science and Engineering, Yamagata University, 4-3-16 Johnan, Yonezawa City, Yamagata, 992-8510, Japan

5School of Applied Physics, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia


Corresponding author: chongtetvui@gmail.com


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 non-magnetic 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.

 

Keywords: Hole concentration, non-magnetic impurity, transition temperature.

 

 

Vol.2019:061