| Autor: |
Mario Curiel, Jesús M. Siqueiros, Lourdes Mestres, Dario Bueno-Baques, J. Portelles, R. Font, Carlos Ostos, Roberto Machorro, O. Raymond |
| Rok vydání: |
2014 |
| Předmět: |
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| Zdroj: |
Acta Materialia. 66:184-191 |
| ISSN: |
1359-6454 |
| DOI: |
10.1016/j.actamat.2013.11.073 |
| Popis: |
The ferroelectric and magnetic properties and the magnetoelectric coupling (MEC) effects of Pb(Fe0.5Nb0.5)O3 (PFN) thin films grown on SrRuO3/Si substrates by the radiofrequency (RF) magnetron sputtering technique were studied. Highly textured, single-phase films with [1 1 0] preferential orientation and different thicknesses were successfully grown. Electric (P–E) hysteresis loops showed excellent and almost constant values of the maximum (∼65 μC cm−2) and remanent (∼25 μC cm−2) polarizations from 4 K to room temperature. Ferromagnetic order in the low-temperature region (below 50 K) is reported for the first time in PFN and discussed. The maximum (∼3 emu g−1) and remanent (∼1.5 emu g−1) magnetization values were obtained. Magnetic field dependence of the ferroelectric hysteresis loops was investigated for temperatures of between 4 and 100 K. Coexistence of ferroelectricity, magnetism and spin crossover phenomena were observed, and a significant direct DC MEC effect expressed by the coefficient α = ΔPr/ΔH with maximum value of 120 pC cm−2 Oe−1 at 4 K is reported. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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