TITLE:
Structural, Magnetic and Dielectric Studies on Strontium Substituted Nd2CuO4 System
AUTHORS:
Venugopalan Anbarasu, Appasamy Manigandan, Kandasamy Sivakumar
KEYWORDS:
Ln2CuO4, Structural Analysis, Powder XRD, Dielectric Studies, Magnetization, ESR Analysis
JOURNAL NAME:
Journal of Modern Physics,
Vol.1 No.2,
June
29,
2010
ABSTRACT: The substitution of Strontium on T'–structured Nd2CuO4 system has been carried out through solid state reaction tech-nique. From the Powder XRD patterns, it is found that the compounds are formed in single phase and crystallizes in orthorhombic structure. The variation in lattice parameters with decreasing nature of volume of the prepared com-pounds confirms the incorporation of lower atomic radii Strontium in Neodymium site. Surface morphology and ele-mental composition studies are also carried out to know the nature of the compounds and effect of Strontium substitu-tion in Nd2CuO4 system. The paramagnetic nature of all the prepared compounds has been identified through magnetization studies and the results are correlated with the electron spin resonance studies by the way of variation in resonance field and broad peak width. Increasing order of dielectric constant on higher doping concentration of Strontium and the least value of dielectric loss at higher frequencies confirms the improved surface transport properties of the prepared compounds.