{'fraction_non_alphanumeric': 0.057291666666666664, 'fraction_numerical': 0.06966145833333333, 'mean_word_length': 4.450354609929078, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 3, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
EFFECT OF PRASEODYMIUM SUBSTITUTED ON THE STRUCTURAL AND ELECTRICAL TRANSPORT PROPERTIES OF La0.5Ba0.5MnO3 PEROVSKITE

The influence of praseodymium substituting at La-site in La0.5Ba0.5MnO3 has been investigated, in magnetotransport and structural properties. The doping Pr at La site on La-Ba-Mn-O ceramics was using solid state reaction. Polycrystalline (La1-x Prx)0.5Ba0.5MnO3 (x = 0, 0.167, 0.33, 0.5, 0.67, 0.833, 1) is doped with Pr site based manganites, calcined at 900 o C for 12 hours, pelletized and sintered at 1300 o C for 24 hours have been synthesized and investigated. The electrical property, Tp was determined by using standard four-point probe resistivity measurement in a temperature range of 30 K to 300 K. With increasing the Pr doping, Tp for the films shifted to lower temperatures, which are 254, 248, 228, 220, 196, 180, 158 K for the bulks with x = 0, 0.167, 0.33, 0.5, 0.67, 0.833, 1, respectively. As the Praseodymium concentration increases, the metal-insulator transition temperature (Tp) decreases while the activation energy in the insulating region (T > Tp) and resistivity increases. The structural property of bulk samples have been investigated via X-Ray Diffragtometer (XRD). XRD patterns show that these systems are in single-phase. The lattice parameters of undoped sample, La0.5Ba0.5MnO3 can be observed at, a ≈ 15.120 A, b ≈ 7.776A and c ≈ 4.335A. All the samples are in orthorhombic distortion perovskite structure with a > b > c. The unit cell volume decreases as Pr concentration increases.