Synthesis, properties and crystal structure and electronic structure of the high-pressure multi-material iron View Homepage


Ontology type: schema:MonetaryGrant     


Grant Info

YEARS

2007-2010

FUNDING AMOUNT

420000 CNY

ABSTRACT

Structural investigations on multiferroic BiMnO3 reveal that the oxygen-vacancy ordereing induced modulated phase is the possible origin of ferroelectricity. In double perovskite oxides Bi2FeCrO6 and Bi2NiMnO6, coexistence of non-modulated and modulated phases are revealed. In the modulated phase, the modulation planes are (101) and (001), respectively.The magnetism and electric transport studies on multiferroic LuFe2O4, Pr1.2Sr1.8Mn2O7 and Pr1Sr2Mn2O7 under high pressure reveal that pressure favors their paramagnetic states, their ferri- and ferromagnetic transitions are hampered. Systematic investigations on the structure, magnetic, dielectric and ferroelectric properties of transition metal (Fe and Mn) doped BaTiO3 are also performed. In addition to the structural phase separation observed in low-concentration doped hexagonal pases, modulated phases are observed in high-concentration doped samples.In Fe (x = 0.1) doped non-modulated hexagonal phase, electron-phonon coupling induced cross-controlled magnetoelectric effect at room temperature is discovered. In other concentration Fe-doped samples, coexistence of relaxor ferroelectricity and weak ferrimagneism is observed at room temperature. In Mn-doped hexagonal phases, weak ferrimagnetism is also observed at room temperature, however, a transition to another More... »

URL

http://npd.nsfc.gov.cn/projectDetail.action?pid=10774168

Related SciGraph Publications

  • 2008-09. Structure and polytypic faults in Ba4NdMn3O12 compound in JOURNAL OF MATERIALS SCIENCE
  • 2008-05. Is ferroelectricity in BiMnO3 induced by superlattice? in JOURNAL OF MATERIALS SCIENCE
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