{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,8]],"date-time":"2026-02-08T15:07:47Z","timestamp":1770563267680,"version":"3.49.0"},"reference-count":50,"publisher":"AIP Publishing","issue":"7","funder":[{"DOI":"10.13039\/501100001871","name":"Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia","doi-asserted-by":"publisher","award":["SFRH\/BPD\/75582\/2010"],"award-info":[{"award-number":["SFRH\/BPD\/75582\/2010"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["pubs.aip.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2016,8,21]]},"abstract":"<jats:p>Lead-free multiferroic bilayer thin films were fabricated on (111)Pt\/Si substrate via a simple sol-gel chemical solution deposition, by altering the position of piezoelectric (Ba0.85Ca0.15) (Ti0.9Zr0.1)O3 (BCTZO) and ferromagnetic CoFe2O4 (CFO). Single layer BCTZO experiences the out-of-plane compressive stress, while this layer is under tensile strain in both the bilayers. The microstructural study confirms the formation of bilayers with expected chemical composition composed of multiple well-developed crystallites having no crystallographic dependencies. Thin films of BCTZO and CFO\/BCTZO exhibited saturated ferroelectric hysteresis loops at room temperature with a Pr of 7.2 and 5.6\u2009\u03bcC\/cm2. The magnetic field induced shift in phonon vibrations coupled with direct magnetoelectric (ME) measurements demonstrated a stress-mediated coupling mechanism in the bilayers. We found a superior ME coefficient (105 MV\/cm Oe) and dielectric tunability (\u223c52%) for CFO\/BCTZO bilayer compared to the BCTZO\/CFO bilayer, which demonstrates that the modification of strain state in bilayers is useful for the desired ME coupling. The BCTZO having piezoelectricity on par with that of lead-based ones can be useful to tailor lead-free ME applications.<\/jats:p>","DOI":"10.1063\/1.4961394","type":"journal-article","created":{"date-parts":[[2016,8,19]],"date-time":"2016-08-19T17:00:25Z","timestamp":1471626025000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":29,"title":["Magnetoelectric studies on CoFe2O4\/0.5(BaTi0.8Zr0.2O3)-0.5(Ba0.7Ca0.3TiO3) lead-free bilayer thin films derived by the chemical solution deposition"],"prefix":"10.1063","volume":"120","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0477-261X","authenticated-orcid":false,"given":"E.","family":"Venkata Ramana","sequence":"first","affiliation":[{"name":"University of Aveiro 1 I3N-Aveiro, Department of Physics, , Aveiro 3810 193, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8822-4089","authenticated-orcid":false,"given":"Janez","family":"Zava\u0161nik","sequence":"additional","affiliation":[{"name":"Jo\u017eef Stefan Institute 2 , Center for Electron Microscopy and Microanalysis, Jamova cesta 39, 1000 Ljubljana, Slovenia"}]},{"given":"M. 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