The magnetic properties of Bi{sub 0.9}Ba{sub 0.1}Fe{sub 0.81}M{sub 0.09}Ti{sub 0.1}O{sub 3} solid solutions (M = Co, Mn, Sc, Al)

Journal Article · Tue Nov 15 04:00:00 EST 2011 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2011.07.039· OSTI ID:22210100

Shi, Chenyang ^[1]; Hao, Yongmei ^[1]; Tan, Yanqing ^[1]; Song, Rui ^[1]

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1. College of Chemistry and Chemical Engineering, Graduate University of Chinese Academy of Sciences, 19 (A) Yu Quan Road, Beijing 100049 (China)

Graphical abstract: In Bi{sub 0.9}Ba{sub 0.1}Fe{sub 0.9}Ti{sub 0.1}O{sub 3} solid solution, both magnetic ions (Co{sup 3+}, Mn{sup 3+}) and nonmagnetic ions (Sc{sup 3+}, Al{sup 3+}) were chosen to partially replace Fe{sup 3+}. Their magnetic properties were carefully investigated. Figures show M-H loops at RT of Co{sup 3+} doped sample (left) and Sc{sup 3+} substituted solid solution (right). Highlights: {yields} The electrical resistivity of BiFeO{sub 3} is enhanced by forming solid solution with BaTiO{sub 3}. {yields} We replace Fe{sup 3+} by both magnetic ions Co{sup 3+}, Mn{sup 4+} and nonmagnetic ions Sc{sup 3+}, Al{sup 3+} to investigate the magnetic properties. {yields} Structure-magnetic property relationship has been established by Rietveld refinement. -- Abstract: Solid solutions with general formula Bi{sub 0.9}Ba{sub 0.1}Fe{sub 0.81}M{sub 0.09}Ti{sub 0.1}O{sub 3} (M = Co, Mn, Sc, Al) together with parental Bi{sub 0.9}Ba{sub 0.1}Fe{sub 0.9}Ti{sub 0.1}O{sub 3} were prepared by the traditional solid state reaction method. Their structural, room temperature magnetic, and dielectric properties were investigated. X-ray diffraction analysis indicated that all samples maintained original R3c space group. M-H hysteresis loop of Co{sup 3+} doped sample saturated at an applied field of 1 T with spontaneous magnetization of 1.735 emu/g, while Mn{sup 4+} substitution enhanced the magnetization of Bi{sub 0.9}Ba{sub 0.1}Fe{sub 0.9}Ti{sub 0.1}O{sub 3} less strongly; addition of Sc{sup 3+} helped decrease magnetic coercive field while Al{sup 3+} modified sample exhibited paramagnetic M-H hysteresis loop. Differential scanning calorimetry was applied to determine the Neel temperature (T{sub N}) and the T{sub N} for undoped, Co{sup 3+}, Mn{sup 4+}, Sc{sup 3+}, Al{sup 3+} doped solid solutions were 318.1, 324.3, 335.7, 293.9 and 295.8 respectively. Sc{sup 3+} substitution had little influence on the dielectric properties of Bi{sub 0.9}Ba{sub 0.1}Fe{sub 0.9}Ti{sub 0.1}O{sub 3} while Al{sup 3+} doping improved its dielectric constant. In contrast, Co{sup 3+}, Mn{sup 4+} doped samples showed decreased permittivity but inhibited tan {delta} at frequencies larger than 30 kHz.

• OSTI ID: 22210100
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 11 Vol. 46; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM IONS
CALORIMETRY
COBALT IONS
DOPED MATERIALS
ELECTRIC CONDUCTIVITY
HYSTERESIS
INORGANIC COMPOUNDS
IRON IONS
MAGNETIC PROPERTIES
MAGNETIZATION
MANGANESE IONS
PARAMAGNETISM
PERMITTIVITY
SCANDIUM IONS
SOLID SOLUTIONS
SOLIDS
SPACE GROUPS
TRIGONAL LATTICES
X-RAY DIFFRACTION