The effect of grain size on structural, magnetic and transport properties in were dissolved in diluted nitric acid in which an excess of citric acid and ethylene glycol was added to make a metal complex. After all the reactants had completely dissolved, the solution was mixed and heated on a hot plate resulting in the formation of a gel. The gel was dried at 250 °C, and then preheated to 600 °C to remove the remaining organic and to decompose the nitrates of the gel. The resulting powder was pressed into pellets, each of which was sintered at a different temperature (T s = 800 °C, 900 °C and 1000 °C) in air. In order to obtain a polycrystalline reference pattern, The crystal structures were examined by x-ray diffractometer using Cu 4 α K radiation at room temperature. The magnetic measurements were carried out with a Quantum Design superconducting quantum interference device (SQUID) MPMS system (2 ≤T≤400 K, 0 ≤ H ≤5 T). Both zero-field-cooling (ZFC) and field-cooling (FC) data were recorded. The resistance was measured by the standard four-probe method from 25 to 300 K. ACKNOWLEDGMENTS

No abstract

No abstract

No abstract

No abstract

No abstract

No abstract

No abstract