Observation of strong magnetoelectric coupling and ferromagnetism at room temperature in Fe substituted ferroelectric BaZr0.05Ti0.95O3 thin films
| Autor: | R.K. Kotnala, Ram S. Katiyar, Jyoti Shah, Danilo G. Barrionuevo Diestra, Mukesh Kumari, Ratnamala Chatterjee |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Condensed matter physics General Physics and Astronomy 02 engineering and technology Coercivity 021001 nanoscience & nanotechnology 01 natural sciences Ferroelectricity Pulsed laser deposition Piezoresponse force microscopy Nuclear magnetic resonance Ferromagnetism Remanence 0103 physical sciences Thin film 0210 nano-technology Coupling coefficient of resonators |
| Zdroj: | Journal of Applied Physics. 121:034101 |
| ISSN: | 1089-7550 0021-8979 |
| DOI: | 10.1063/1.4974007 |
| Popis: | Single phase polycrystalline thin films (∼100 nm) of BaZr0.05(FexTi1−3x/4)0.95O3, with x = 0 (BZT) and 0.015 (BZFT15), were grown on Pt/TiO2/SiO2/Si substrate using pulsed laser deposition technique. Room temperature ferromagnetism with a remanent magnetization (Mr) ∼ 1.1 × 10−1 emu/cm3 and a coercive field (Hc) ∼ 0.1 kOe was observed in BZFT15 film. The ferroelectric domain switching in both BZT and BZFT15 films is confirmed by piezoresponse force microscopy (PFM). The magnetoelectric coupling coefficient (α) measured at room temperature in the BZFT15 film in in-plane magnetized-out of plane polarized configuration (L-T mode) was found to be ∼165 mV/cm Oe. It is argued that the observed ferromagnetism in BZFT15 films arises from the oxygen vacancy (Ov) mediated (Fe3+–Ov–Fe3+) exchange. |
| Databáze: | OpenAIRE |
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