| Título: | Electromagnetic Properties of Substituted Ba - Ferrites by Selected Cations |
| Autores: |
Gruskova, Anna Papanova, Maria Slama, Josef Kevicka, Darina |
| Fecha: | 2011-07-07 |
| Publicador: | Advances in Electrical and Electronic Engineering |
| Fuente: |
 |
| Tipo: |
|
| Tema: | Barium; magnetic; magnetocrystalline; ions; position. |
| Descripción: | The powdered samples of barium hexaferrite BaFe12-2x(Me1Me2) with x varying from 0.0 to 0.6 were prepared by citrate precursor method. The cation preference of mainly four-valence Me1=(Zr, Ti, Sn) ions and two-valence Me2=(Co, Ni, Zn) ions and their combinations in substituted Ba ferrites were investigated by the thermomagnetic analysis, Mossbauer spectroscopy and measurement of the magnetic properties. Mossbaur studies reveal that Zr4+, Sn4+ and less Co2+, Zn2+ ions have a strong preference to occupy 2b position, this position has the greatest contribution to the magnetocrystalline anisotropy. The La3+, Ti4+, Ni2+ ions preferently enter 4f2 sites and Zn2+, Co2+ ions also prefer to occupy 4f1 tetrahedral sites. The specific saturation magnetic polarisation Js-m and remanence Js-r increased with small x due to th substitution of non-magnetic and less magnetic ions in 4f1 and 4f2 sites. The coercivity Hc was casily controllable by the sustituions level x. |
| Idioma: | Inglés |
1 The Applications for the Calculation and Optimization of Passive Optical Networks Attenuation Characteristics por Lafata, Pavel,Vodrazka, Jiri | 6 Binary Modulation Formats in Optical Access Networks por Tejkal, Vladimir,Filka, Miloslav,Reichert, Pavel,Sporik, Jan |
2 The Study of Sensory Properties of Quasi-Singlemode Fiber por Koudelka, Petr; Department of Telecommunications
Faculty of Electrical Engineering and Computer Science
VSB-TU Ostrava
17. listopadu 15/2172
708 33 Ostrava-Poruba
Czech Republic,Latal, Jan,Siska, Petr,Hanacek, Frantisek,Skapa, Jan,Vasinek, Vladimir | 7 Optical Fiber Sensor with Distributed Parameters Based on Optical Fiber Reflectometry por Korenko, Branislav,Jasenek, Jozef,Cervenova, Jozefa,Hlavac, Marek |
3 Fiber Optical Sensor for High Temperatures por Hanacek, Frantisek; Site Administrator,Latal, Jan,Koudelka, Petr,Skapa, Jan,Siska, Petr,Vasinek, Vladimir,Hurta, Jan | 8 Future of Electrotechnics: Ferrofluids por Mayer, Daniel |
4 The Soliton Transmissions in Optical Fibers por Bohac, Leos | 9 Analysis of Simulated Reflection Characteristics of Uniform and Apodized Fiber Bragg Gratings por Gemzicky, Erik,Mullerova, Jarmila |
5 Influence of Magnetic Field on Electric Charge Trasport in Holmium Thin Film at Low Temperature por Dudas, Jan,Gabani, Stanislav,Bagi, Jozef,Goscianska, Iwona,Hodulikova, Anna | 10 WDM in Courses of Communication Technologies por Filka, Miloslav,Bernkopf, Miroslav |