01752nas a2200157   4500008004100000245013400041210006900175260000800244300002700252490000600279520113600285100001801421700001701439700001601456856012201472       2017                        eng d00aStructural, magnetic, dielectric and magnetodielectric properties of Bi1-xCaxFe1-xMnxO3 in the morphotropic phase boundary region0 aStructural magnetic dielectric and magnetodielectric properties   cJAN  aArticle Number: 0161040 v43 aStructural, magnetic, dielectric and magnetodielectric properties of Ca and Mn co-substituted bismuth ferrite, Bi1-xCaxFe1-xMnxO3 (0 <= x <= 0.4) are reported. Structural studies by Rietveld refinement of XRD patterns revealed rhombohedral R3c structure for x <= 0.11 and orthorhombic Pbnm structure for x >= 0.2. For compositions in the range 0.11 < x < 0.2, mixed phase behaviour is observed showing a morphotropic phase boundary (MPB) region. Magnetisation at room temperature increases with increasing Ca and Mn content, showing weak ferromagnetism. Coercivity and remanence initially increase and then decrease with increasing x, showing a maximum for x = 0.175 in the MPB region. Dielectric constant also shows a maximum value in the mixed phase region. Magnetodielectric (MD) studies revealed positive MD for the R3c phase and a negative MD for the Pbnm phase, showing a maximum MD (similar to 1%) for x approximate to 0.1 and crossover at x approximate to 0.175. The studies show strong interplay between the structure and properties, suggesting tuneable bismuth ferrite based compositions for magnetoelectric applications.1 aManjunath, B.1 aThakuria, P.1 aJoy, P., A.  uhttps://library.ncl.res.in/content/structural-magnetic-dielectric-and-magnetodielectric-properties-bi1-xcaxfe1-xmnxo301738nas a2200241   4500008004100000245006800041210006700109260000800176300001200184490000800196520100300204100002401207700001801231700001601249700001401265700002001279700002001299700001701319700002601336700001801362700001601380856010001396       2018                        eng d00aStructural and magnetic properties of La2Ni1-xCoxMnO6 compounds0 aStructural and magnetic properties of La2Ni1xCoxMnO6 compounds  cJUN  a248-2560 v1023 aSingle phase monoclinic La2Ni1-xMnO6 (x = 0.2, 0.4, 0.8) compounds, henceforth, referred as LNCxMO (x = 0.2, 0.4, 0.8) have been prepared by Sol-gel technique. The structural study and redox titration suggest that the samples are both La and O deficient. The generated atomic models using Rietveld refined structural parameters show octahedral distortion In the double perovskite structure. X-ray photoelectron spectroscopy (XPS) study has been used to determine the predominant valence states of Ni, Mn and Co ions. LNCxMO (x = 0.2, 0.4) are found to be Heisenberg ferromagnets whereas LNC0.8MO is a phase segregated system. In LNC0.4MO and LNO0.8MO, at temperatures above T-c, chi(-1)(T) curve shows the characteristics of Griffiths phase. The study of ac susceptibility and Isothermal remanent magnetization (IRM) discard the possibility of any glassy state at low temperatures. The antiphase boundaries (APBs), antisite disorders (ASDs) and oxygen vacancies play important roles in this system.1 aPramanik, Debabrata1 aMukherjee, S.1 aDan, Shovan1 aNandy, A.1 aPradhan, S., K.1 aDasgupta, Papri1 aPoddar, Asok1 aMukherjee, Manabendra1 aManjunath, B.1 aJoy, P., A.  uhttps://library.ncl.res.in/content/structural-and-magnetic-properties-la2ni1-xcoxmno6-compounds