Crystal Growth of Bi$_{2}$Sr$_{2}$CaCu$_{2}$O$_{8+{\delta}}$ Whiskers from Pulverized Amorphous Precursors

TL;DR

This paper reports a novel method for growing high-quality Bi-2212 superconducting whiskers from pulverized amorphous precursors, resulting in longer whiskers with unique spiral features and insights into their growth mechanisms.

Contribution

It introduces a new growth technique for Bi-2212 whiskers from pulverized amorphous precursors, enhancing whisker length and revealing growth mechanisms involving vapor-liquid-solid and stress models.

Findings

Whiskers exhibit typical superconducting phase and composition.

Whiskers from tiny precursors show spiral growth features.

Method yields longer whiskers compared to conventional techniques.

Abstract

High-transition temperature superconducting whiskers of Bi$_{2}$Sr$_{2}$CaCu$_{2}$O$_{8+{\delta}}$ were successfully grown from pulverized amorphous precursors. The obtained whiskers revealed a typical composition and diffraction patterns of a superconducting Bi-2212 phase. The whiskers from tiny precursors exhibit a spiral feature, suggesting a contribution from the growth mechanism of both vapor-liquid-solid and compressive stress models. The proposed method provides longer whiskers against the growth period, compared with that from conventional root-growth method.