Nonconventional short-time dc magnetometer for superconducting films

A nonconventional technique for the measurement of magnetic relaxation in superconducting films at short times $(∼10−5 s)$ is described. This technique combines the application of a pulsed magnetic field and a synchronized high-energy pulsed laser. Remanent magnetic relaxation in $(Y;Gd)Ba2Cu3O7−δ$ thin films is reported over five decades time at reduced temperatures above 0.8.