Interplay of piezoresponse and magnetic behavior in Bi0.9A0.1FeO2.95 (A = Ba, Ca) and Bi0.9Ba0.05Ca0.05FeO2.95 co-doped ceramics

G Mangamma; B K Das; B Ramachandran; M S Ramachandra Rao; T N Sairam

doi:10.1039/d1ra08141a

Interplay of piezoresponse and magnetic behavior in Bi_0.9A_0.1FeO_2.95 (A = Ba, Ca) and Bi_0.9Ba_0.05Ca_0.05FeO_2.95 co-doped ceramics

RSC Adv. 2022 Jan 18;12(4):2443-2453. doi: 10.1039/d1ra08141a. eCollection 2022 Jan 12.

Authors

G Mangamma¹, B K Das¹, B Ramachandran², M S Ramachandra Rao², T N Sairam¹

Affiliations

¹ Materials Science Group, Indira Gandhi Centre for Atomic Research & Homi Bhabha National Institute Kalpakkam Tamil Nadu 603102 India.
² Department of Physics, Nano Functional Materials Technology and MSRC, Indian Institute of Technology Madras Chennai 600036 Tamil Nadu India [email protected].

Abstract

Extensive piezoresponse force microscopy (PFM) and magnetic force microscopy (MFM) measurements in conjunction with piezoresponse spectroscopy have been carried out on pellets of Bi_0.9A_0.1FeO_2.95 (A = Ba, Ca) and Bi₀.₉Ba₀.₀₅Ca₀.₀₅FeO_2.95 co-doped ceramic samples in order to characterize their ferroelectric and magnetic nature and correlate the findings with our recent far-infrared spectroscopic studies on these samples. We are able to clearly discern the switching behavior of the 71° and 109° ferroelectric domains as distinct from that of the 180° domains in both pristine and Ba-doped bismuth ferrite samples. While substitution of Ba at the Bi site in bismuth ferrite does not affect the ferroelectric and magnetic properties to a great extent, Ca-doped samples show a decrease in their d ₃₃ values with a concomitant increase in their magnetic behavior. These results are in agreement with the findings from our far-infrared studies.