Effect of nano-size on magnetostriction of BiFeO 3 and exceptional magnetoelectric coupling properties of BiFeO 3 _P(VDF-TrFE) polymer composite films for magnetic field sensor application

• Published in: Smart materials and structures 2023-04, Vol.32 (4), p.45017
• Main Authors: Pradhan, Sonali, Deshmukh, Pratik, Kambale, Rahul C, Darvade, Tulshidas C, Satapathy, S, Majumder, Shovan K
• Format: Article
• Language: English
• ISSN: 0964-1726; 1361-665X
• DOI: 10.1088/1361-665X/acc1b7

The existence of magnetostriction in bulk BiFeO 3 is still a matter of investigation and it is also an issue to investigate the magnetostriction effect in nano BiFeO 3 . Present work demonstrates the existence of magnetostrictive strain in superparamagnetic (SPM) BiFeO 3 nanoparticles at room temperature and the magnetoelectric (ME) coupling properties in composite form with P(VDF-TrFE). Despite few reports on the magnetostriction effect in bulk BiFeO 3 evidenced by the indirect method, the direct method (strain gauge) was employed in this work to examine the magnetostriction of SPM BiFeO 3 . In addition, a high ME coupling coefficient was observed by the lock-in technique for optimized BiFeO 3 _P(VDF-TrFE) nanocomposite film. These nanocomposite films also exhibit room-temperature multiferroic properties. These results provide aspects of material with immense potential for practical applications in spintronics and magneto-electronics applications. We report a ME sensor using SPM BiFeO 3 _P(VDF-TrFE) nanocomposite film for detection of ac magnetic field.