caa a22 4500 445382333 CHVBK 20180317143021.0 cr unu---uuuuu 170323e20110101xx s 000 0 eng 10.1007/s10948-010-1023-2 doi (NATIONALLICENCE)springer-10.1007/s10948-010-1023-2 Ferromagnetic and Charge-Ordered Phases in (Nd, Na)-Mn-O Compounds [Elektronische Daten] [B. Samantaray, S. Ravi] Polycrystalline Nd1−x NaxMnO3 ($x=0.05\mbox{--} 0.20$) compounds were prepared in single-phase form with a Pbnm space group. Paramagnetic to ferromagnetic transitions were observed up to a doping concentration of 15% with a maximum T C of 113K. The x=0.20 sample exhibits a charge order transition at 180K, with a distinct behavior in magnetization versus field curve. The magnetization versus temperature plot of all these materials exhibits an anomaly at around 40K, with a signature of spin-glass like behavior. The x=0.10 sample is found to exhibit a maximum spontaneous magnetization value of 3.1μ B at 20K. The magnetization data could be analyzed based on the Brillouin function model, by accounting for the ferromagnetic interaction. The effective spin contribution of 3d electrons for the double-exchange ferromagnetic interaction and the value of magnetic spin-canting angles were estimated. The measured magnetization is explained on the basis of competing magnetic interaction due to spin-canting. The charge order quenching and the first-order transition from the charge-ordered to ferromagnetic phase are observed for a threshold field of 3T at 12K. The electrical resistivity of the above samples exhibits insulating behavior. Springer Science+Business Media, LLC, 2010 Nd Manganites nationallicence Na-doped nationallicence Ferromagnetism nationallicence Charge ordering nationallicence Spin-canting nationallicence Samantaray B. Department of Physics, Indian Institute of Technology Guwahati, 781039, Guwahati, India aut Ravi S. Department of Physics, Indian Institute of Technology Guwahati, 781039, Guwahati, India aut Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/1-2(2011-01-01), 809-814 1557-1939 24:1-2<809 2011 24 10948 https://doi.org/10.1007/s10948-010-1023-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10948-010-1023-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Samantaray B. Department of Physics, Indian Institute of Technology Guwahati, 781039, Guwahati, India aut NATIONALLICENCE 700 1- Ravi S. Department of Physics, Indian Institute of Technology Guwahati, 781039, Guwahati, India aut NATIONALLICENCE 773 0- Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/1-2(2011-01-01), 809-814 1557-1939 24:1-2<809 2011 24 10948 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer