Substitution effects of Fe and Zn on the superconductivity and microstructure of YBa₂Cu₂O_7−δ (YBCO)

Authors

Ayn Hazel G. Manuel ⋅ PH Materials Science and Engineering Program, University of the Philippines Diliman
Mildred D. Reyes ⋅ PH Materials Science and Engineering Program, University of the Philippines Diliman
Roland V. Sarmago ⋅ PH National Institute of Physics, University of the Philippines Diliman

Abstract

The substitution of iron and zinc for copper in YBa₂Cu_3−xM_xO_7−δ at x = 0.01 have different effects on the microstructure and superconductivity of YBa₂Cu₃O_7−δ (YBCO). From the magnetic susceptibility and resistance measurements, Zn doped YBCO has a T_c ≈ 85 K while the Fe doped YBCO has a T_c ≈ 91 K. This supports studies that Zn doped YBCO suppresses the superconductivity more compared with the Fe-doped YBCO, which is attributed to the absence of local moments at the Zn sites. XRD patterns show that both samples have an orthorhombic structure. Using Scanning Electron Microscopy, the Fe doped sample has the largest grains (approximately 8–10 μm) compared with the undoped YBCO and Zn doped YBCO. This shows that having more connected grains allows easier completion of the superconducting path.

Downloads

Issue

2002: Proceedings of the 20th Samahang Pisika ng Pilipinas Physics Congress

Article ID

SPP-2002-2D-06

Section

Condensed Matter and Plasma Physics

Published

2002-10-23

How to Cite

[1]

AHG Manuel, MD Reyes, and RV Sarmago, Substitution effects of Fe and Zn on the superconductivity and microstructure of YBa2Cu2O7−δ (YBCO), Proceedings of the Samahang Pisika ng Pilipinas 20, SPP-2002-2D-06 (2002). URL: https://proceedings.spp-online.org/article/view/SPP-2002-2D-06.