Magnetic And Dielectric Proprieties Of Multiferroic (1-x)pb(fe 2/3w 1/3)o 3-xpbtio 3 Ceramics Prepared Via A Modified Two-stage Solid-state Reaction

Multiferroic Pb(Fe 2/3W 1/3)O 3-PbTiO 3 (PFW-PT) ceramics were synthesized via a modified two-stage solid-state reaction. This method utilized Fe 2WO 6, prepared at a first-stage, which was subsequently reacted with a stoichiometric amount of PbO and TiO 2 at the second stage. This procedure efficiently suppressed the formation of lead tungstates and leads to getting dense ceramics. Electric and dielectric properties of (1-x)Pb(Fe 2/3W 1/3)O 3-xPbTiO 3 solid solutions were investigated as a function of the frequency and temperature. All samples present density higher than 96% of the theoretical one, low percentage of pyrochlore phase (<2%) and relatively high electrical resistivity (>10 10 Ω.m). RF dielectric measurements over the temperature showed the presence of a peak, which is related to the ferro-paraelectric phase transition and conductive contributions (in the range 200-700 K), associated to a electronic hoping mechanism. The dielectric properties of the PFW shows a typical relaxor behaviour for x = 0 and 0.10 with frequency-dependent peak temperature (Tm), while the samples with higher PT-content undergo a 'normal' para-ferroelectric transition at the Curie temperature T C.The FE phase transition of PFW is shifted to higher temperatures by PbTiO 3 (PT) additions and high resistivity are obtained for PT containing samples. Different types of magnetic activity dependent on composition and temperature were found.144434441Ivanov, S.A., Eriksson, S.-G., Tellgren, R., Rundlof, H., Neutron powder diffraction study of the magnetoelectric relaxor Pb(Fe 2/3W 1/3)O 3 (2004) Materials Research Bulletin, 39 (14-15), pp. 2317-2328. , DOI 10.1016/j.materresbull.2004.07.025, PII S0025540804002260Mitoseriu, L., Vilarinho, P.M., Viviani, M., Baptista, J.L., Structural study of Pb(Fe 2/3W 1/3)O 3-PbTiO 3 system (2002) Materials Letters, 57 (3), pp. 609-614. , DOI 10.1016/S0167-577X(02)00839-X, PII S0167577X0200839XHong, C.-S., Chu, S.-Y., Li, B.-J., Su, W.-C., Chang, R.-C., Nien, H.-H., Investigation of the dielectric properties of MnO-additive Pb (Fe 2/3W 1/3) - PbTiO 3 relaxors using the spin-glass model (2008) Journal of Applied Physics, 103, pp. 094102-094108. , http://dx.doi.org/10.1063/1.2903511Liou, Y.-C., Effect of heating rate on properties of Pb (Fe 1/2Nb 1/2) O 3 ceramics produced by simplified wolframite route (2004) Ceramics International, 30, pp. 567-569. , http://dx.doi.org/10.1016/j.ceramint.2003.09.008Fiebig, M., Revival of the magnetoelectric effect (2005) Journal of Physics D: Applied Physics, 38, pp. 123-152. , http://dx.doi.org/10.1088/0022-3727/38/8/R01Mitoseriu, L., Stancu, A., Fedor, C., Vilarinho, P.M., Analysis of the composition-induced transition from relaxor to ferroelectric state in PbFe2/3W1/3O3-PbTiO3 solid solutions (2003) Journal of Applied Physics, 94, pp. 1918-1925. , http://dx.doi.org/10.1063/1.1586470Ivanov, S.A., Structural, magnetic and Mossbauer spectroscopic investigations (2007) Solid State Sciences, 9, pp. 440-450. , http://dx.doi.org/10.1016/j.solidstatesciences.2007.03.018Mitoseriu, L., Marré, D., Siri, A.S., Nanni, P., Magnetic properties of PbFe 2/3W 1/3O 3-PbTiO 3 solid solutions (2003) Applied Physics Letters, 83, pp. 5509-5511. , http://dx.doi.org/10.1063/1.1632033Feng, L., Guo, H., Ye, Z.-G., Magnetic ordering in relaxor ferroelectric (1 - x)Pb(Fe 2/3 W 1/3)O 3-xPbTiO 3 single crystals (2007) Journal of Materials Research, 22 (8), pp. 2116-2124. , DOI 10.1557/jmr.2007.0265Lu, C.H., Shinokasi, K., Mizutani, N., Kato, M., Liquid-phase formation in reaction process of 3PbO. Fe 2O 3. WO 3 (1989) Journal of the Ceramic Society of Japan, 97, pp. 97115-97120Mizutani Nobuyasu, Lu Chung-Hsin, Shinozaki Kazuo, Kato Masanori, Formation of a high-temperature liquid phase during the sintering of PbFe 2/3W 1/3O 3 (1990) Journal of the American Ceramic Society, 73 (5), pp. 1214-1220Khim, A.S., Wang, J., Wan, D., Li, L., Xue, J., Mechanical activation-assisted synthesis of Pb (Fe 2/3W 1/3) O 3 (2000) Journal of the American Ceramic Society, 83 (7), pp. 1575-1580Kong, L.B., Zhang, T.S., Ma, J., Boey, F., Progress in synthesis of ferroelectric ceramic materials via high-energy mechanochemical technique (2008) Progress in Materials Science, 53 (2), pp. 207-322. , DOI 10.1016/j.pmatsci.2007.05.001, PII S0079642507000266Khim, A.S., Wang, J., Junmin, X., Seeding effect in the formation of Pb (Fe 2/3W 1/3) O 3 via mechanical activation of mixed oxides (2000) Solid State Ionics, 132, pp. 55-61Khim, A.S., Junmin, X., Wang, J., Pb (Fe 2/3W 1/3) O 3 by mechanical activation of coprecipitated PbO, Fe 2O 3 and WO 3 (2002) Journal of Alloys and Compounds, 343, pp. 156-116Swartz, S.L., Shrout, T.R., Dielectric properties of pyrochlore lead magnesium niobate (1982) Materials Research Bulletin, 17 (10), pp. 1245-1250. , DOI 10.1016/0025-5408(82)90159-3Pinheiro, J.M.V., Mascarenhas, Y.P., Dois programas computacionais úteis em difratometria de raios-x por amostras policristalinas (1985) Anais Da 37 a Reunião Anual da SBPC, , Belo Horizonte. SBPC1985Chung-Hsin, L., Yeak-Chong, W., Fabrication of ferroelectric lead iron tungstate ceramics via a two-stage solid-state reaction (1995) Ceramics International, 21, pp. 413-419. , http://dx.doi.org/10.1016/0272-8842(02)72884-NKingery, W.D., Narasimhan, M.D., Densification during sintering in the presence of a liquid phase. II. Experimental (1959) Journal of Applied Physics, 30, pp. 307-310. , http://dx.doi.org/10.1063/1.1735156Fang, B., Sun, R., Shan, Y., Tezuka, K., Imoto, H., On the feasibility of synthesizing complex perovskite ferroelectric ceramics via a B-site oxide mixing route (2007) Journal of Materials Science, 42 (22), pp. 9227-9233. , DOI 10.1007/s10853-007-1908-zSzwagierczak, D., Kulawik, J., Influence of MnO 2 and Co 3O 4 dopants on dielectric properties of Pb(Fe 2/3W 1/3)O 3 ceramics (2005) Journal of the European Ceramic Society, 25 (9), pp. 1657-1662. , DOI 10.1016/j.jeurceramsoc.2004.05.022, PII S0955221904002584Feng, L., Ye, Z.G., Phase diagram and phase transitions in the relaxor ferroelectric Pb (Fe 2/3W 1/3) O 3-PbTiO 3 system (2002) Journal of Solid State Chemistry, 163, pp. 484-490. , http://dx.doi.org/10.1006/jssc.2001.9433Zhou, L., Vilarinho, P.M., Baptista, J.L., Ordering in lead iron tungstate relaxor ceramics (1998) Journal of the European Ceramic Society, 18 (10), pp. 1383-1387. , PII S0955221998000259Raymond, O., Font, R., Portelles, J., Suárez-Almodovar, N., Siqueiros, J.M., Frequency-temperature response of ferroelectromagnetic Pb (Fe 1/2Nb 1/2) O 3 ceramics obtained by different precursors. III. Dielectric relaxation near the transition temperature (2006) Journal of Applied Physics, 99, pp. 1241011-1241019. , http://dx.doi.org/10.1063/1.2201853Isupov, V.A., Peculiarities of the PbB 2/3 2+B 1/3 6+O 3 perovskites (2005) Ferroelectrics, 315, pp. 149-116. , http://dx.doi.org/10.1080/00150190490891463Bokov, A.A., Lattice site ion ordering effect on properties of Pb 2b'b" O 6 type triple oxides (1983) Fizika Tverdogo Tela, 25, pp. 2025-202