caa a22 4500 463212789 CHVBK 20180405153146.0 cr unu---uuuuu 170326e20071101xx s 000 0 eng 10.1007/s00339-007-4177-4 doi (NATIONALLICENCE)springer-10.1007/s00339-007-4177-4 Dielectric dispersion and magnetic properties of Ba-modified Pb(Fe1/2Nb1/2)O3 [Elektronische Daten] [D. Varshney, R.N.P Choudhary, C. Rinaldi, R.S. Katiyar] The polycrystalline samples of Ba-modified Pb(Fe1/2Nb1/2)O3 (i.e., (Pb1-xBax)(Fe1/2Nb1/2)O3 PBFN, with x=0,0.05,0.07) were synthesized by a mechanosynthesis (i.e., high-energy ball milling) route followed by a mixed oxide method. Structural analysis provides the information on formation of single-phase orthorhombic structure on substitution of a small amount (x=0.07) of Ba at the Pb-site of Pb(Fe0.50Nb0.50)O3 (PFN). The ferroelectric-paraelectric phase transition in PFN was observed at 383K, which decreases on increasing Ba-concentration in PBFN. Detailed studies of dielectric properties of PBFW show the following: (i) diffuse phase transition, (ii) low loss tangent, (iii) low activation energy, and (iv) low frequency dielectric dispersion. An anomaly in the ac conductivity was found very close to phase transition temperature. The activation energy is found to decrease from 0.19 to 0.01eV on increasing Ba-concentration to 7% (x=0.07). Temperature field-dependent magnetization measurements of all the samples showed antiferromagnetic transition at ∼15K (for x=0.07). PBFN sample showed a slight increase in the coercivity (i.e., from 400Oe (PFN) to 500Oe (PBFN, for x=0.07) at 2K. Springer-Verlag, 2007 Varshney D. Department of Physics, University of Puerto Rico, 00931, San Juan, Puerto Rico aut Choudhary R.N.P. Department of Physics, University of Puerto Rico, 00931, San Juan, Puerto Rico aut Rinaldi C. Department of Chemical Engineering, University of Puerto Rico, 00681, Mayaguez, Puerto Rico aut Katiyar R.S. Department of Physics, University of Puerto Rico, 00931, San Juan, Puerto Rico aut Applied Physics A Springer-Verlag 89/3(2007-11-01), 793-798 0947-8396 89:3<793 2007 89 339 https://doi.org/10.1007/s00339-007-4177-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00339-007-4177-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Varshney D. Department of Physics, University of Puerto Rico, 00931, San Juan, Puerto Rico aut NATIONALLICENCE 700 1- Choudhary R.N.P. Department of Physics, University of Puerto Rico, 00931, San Juan, Puerto Rico aut NATIONALLICENCE 700 1- Rinaldi C. Department of Chemical Engineering, University of Puerto Rico, 00681, Mayaguez, Puerto Rico aut NATIONALLICENCE 700 1- Katiyar R.S. Department of Physics, University of Puerto Rico, 00931, San Juan, Puerto Rico aut NATIONALLICENCE 773 0- Applied Physics A Springer-Verlag 89/3(2007-11-01), 793-798 0947-8396 89:3<793 2007 89 339 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer