| Autor: |
Esther Rubavathi, P., Venkidu, L., Veera Gajendra Babu, M., Venkat Raman, R., Bagyalakshmi, B., Abdul Kader, S. M., Baskar, K., Muneeswaran, M., Giridharan, N. V., Sundarakannan, B. |
| Předmět: |
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| Zdroj: |
Journal of Materials Science: Materials in Electronics; Mar2019, Vol. 30 Issue 6, p5706-5717, 12p |
| Abstrakt: |
Ferromagnetism is successfully imposed on a robust ferroelectric material by Fe-substitution and magnetodielectric investigation of the ceramics leads us to propose a sensor for magnetic field measurement. Tetragonal to hexagonal structural phase transformation is unambiguously identified from Rietveld refinement of the structure. Coexistence of tetragonal and hexagonal phase is also identified from Raman spectra and SAED. Structural details of the two phases and phase percentage are correlated to the physical properties obtained from P-E loop, M-H loop and magnetodielectric measurements. Ferroelectric loops are diminished due to pinning of domain wall motion by oxygen vacancies and an increase of the non-ferroelectric hexagonal phase percentage. The decrease of remnant magnetization is ascribed to the occupancy of Fe in pentahedral-octahedral sites and oxygen vacancies. Magnetodielectric dispersion below 104 Hz is predominantly due to extrinsic origin through the combined effect of space charge polarization and magnetoresistance. The intrinsic magnetodielectric effect above 104 Hz is attributed to strain mediated magnetoelectric coupling. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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