Morphotropic phase boundary, weak ferromagnetism, and strong piezoelectric effect in Bi{sub 1-x}Ca{sub x}FeO{sub 3-x/2} compounds

Journal Article · Thu Dec 15 00:00:00 EST 2011 · Journal of Experimental and Theoretical Physics

DOI:https://doi.org/10.1134/S1063776111140196· OSTI ID:22027959

Karpinsky, D V; Bushinsky, M V; Kovetskaya, M I ^[1]; Efimova, E A ^[2]; Eremenko, V V ^[3]

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1. National Academy of Sciences of Belarus, SSPA Scientific and Practical Materials Research Center (Belarus)
2. Joint Institute for Nuclear Research (Russian Federation)
3. Verkin Physicotechnical Institute for Low Temperatures (Ukraine)

The crystal structure and magnetic and piezoelectric properties of the Bi{sub 1-x}Ca{sub x}FeO{sub 3-x/2} system (x {<=} 0.2) are studied. The crystal-structure transformations occur in the following sequence: rhombohedral (R3c) polar phase (x {<=} 0.06) {yields} modulated polar phase (0.07 {<=} x {<=} 0.1) {yields} modulated antipolar phase (0.11 {<=} x {<=} 0.14). The modulated polar and antipolar phases are weakly ferromagnetic with a spontaneous magnetization of 0.25 G cm{sup 3}/g (x = 0.09). In the polar weak ferromagnet with x = 0.09, a uniform piezoelec- tric response 2.5 times stronger than in the initial BiFeO{sub 3} compound is detected by the piezoelectric force microscopy.

• OSTI ID: 22027959
• Journal Information: Journal of Experimental and Theoretical Physics, Vol. 113, Issue 6; Other Information: Copyright (c) 2011 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7761
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BISMUTH COMPOUNDS
CALCIUM COMPOUNDS
CONCENTRATION RATIO
FERROMAGNETISM
IRON OXIDES
MAGNETIZATION
MICROSCOPY
PHASE TRANSFORMATIONS
PIEZOELECTRICITY
TRIGONAL LATTICES