SUPERCONDUCTIVITY IN A NEW NDBA2CA3SR4CU5OX SYSTEM

A new compound, NdBa2Ca3Sr4Cu5OX, has been synthesised using the conve ntional solid state reaction technique. The material was characterised by powder XRD, electrical resistivity, ac susceptibility and dc magne tisation studies. The results of powder X-ray diffraction show that th e structure is pseudo orthorhombic, having unit cell dimensions a = 5. 47 Angstrom, b = 5.46 Angstrom and c = 14.58 Angstrom. Magnetisation s tudies on a SQUID magnetometer showed a superconducting transition at 52 K. This was confirmed by the measurements of electrical resistance and ac susceptibility of this sample, which also showed superconductiv ity at 52 K. Details of preparation and characterisation are discussed .