# Preparation and Peculiar Magnetic Properties at Low Temperatures of La1.85Sr0.15CuO4 Nanofibers

## TL;DR

Researchers made La1.85Sr0.15CuO4 nanofibers and found they show superconductivity and unexpected magnetic behavior at low temperatures.

## Contribution

The study reports the synthesis and unique low-temperature magnetic properties of LSCO nanofibers with a superconducting transition temperature of 25.21 K.

## Key findings

- LSCO nanofibers were successfully synthesized with uniform grain size using electrospinning and calcination.
- A superconducting transition temperature of 25.21 K was observed in the nanofibers.
- Ferromagnetic behavior was detected at low temperatures, possibly due to surface states in the nanoscale material.

## Abstract

Herein, the preparation process, morphology, structure, and magnetic properties of La1.85Sr0.15CuO4 (LSCO) cobweb-like nanofibers are reported. LSCO nanofibers with a regular grain size distribution are successfully prepared via electrospinning, followed by calcination. We conducted morphology analysis and elemental distribution using electron microscopy and energy-dispersive X-ray spectroscopy (EDS), respectively. Additionally, magnetic property testing was performed using a vibrating sample magnetometer (VSM) to confirm the superconducting properties of the samples. Interestingly, our samples exhibited a superconducting transition temperature, Tc, of 25.21 K, which showed some disparity compared to similar works. Furthermore, we observed a ferromagnetic response at low temperatures in the superconducting nanofibers. We attribute these phenomena to the effects generated by surface states of nanoscale superconducting materials.