# Master in Physics

## Structural investigation of La(2-x)Sr(x)CuO(4+y)

This is the web page connected to the master’s project of Pia Jensen Ray from the Niels Bohr Instutute under the University of Copenhagen.

### Abstract

The high-temperature superconductor La$$_{2-x}$$Sr$$_x$$CuO$$_{4+y}$$ was discovered almost three decades ago, but the mechanisms behind the superconductivity in the material are still not fully understood. This thesis adds a small piece to the enormous puzzle of solving high-temperature superconductivity.

X-rays and neutrons have been used to investigate the superstructure known as staging, and temperature dependent results for four different samples will be presented and compared to results for similar compounds from literature.

The four La$$_{2-x}$$Sr$$_x$$CuO$$_{4+y}$$ samples investigated in this thesis.