J. Anthoniappen, C.S. Tu, P.-Y. Chen, C.-S. Chen, Y.U. Idzerda, S.-J. Chiu
Soft X-ray absorption (XAS), transmission electron spectroscopy (TEM), Raman spectroscopy, and synchrotron XRD have been studied in B-site 0-2mol% manganese (Mn) doped (Bi0.5Na0.5)0.925Ba0.075TiO3 (BN7.5BT) relaxor ferroelectric ceramics. High-resolution synchrotron XRD and TEM reveal two phase coexistence of rhombohedral R3c and tetragonal P4bm structures in 0 and 0.2%, and an orthorhombic structure in 1 and 2% Mn-doped BN7.5BT at room temperature. Raman spectra of 0% Mn reveal structural transition from two phase coexistence to tetragonal phase near 190°C with a softening anomaly, while 0.2-2% Mn-doped BN7.5BT show softening behavior near 290°C upon heating. Raman spectra and synchrotron XRD indicate that Mn doping can enhance structural thermal stability in BN7.5BT ceramics. © 2015 Elsevier Ltd.
Graduate Institute of Applied Science and Engineering, Fu Jen Catholic University, New Taipei City, 24205, Taiwan; Department of Physics, Fu Jen Catholic University, New Taipei City, 24205, Taiwan; Department of Mechanical Engineering, Ming Chi University of Technology, New Taipei City, 24301, Taiwan; Department of Mechanical Engineering, Hwa Hsia University of Technology, New Taipei City, 23567, Taiwan; Department of Physics, Montana State University, Bozeman, 59717, MT, United States; National Synchrotron Radiation Research Center, Hsinchu, 30076, Taiwan; Department of Physics, University of San Carlos, Cebu City, 6000, Philippines
