The structural, resistive, magnetic, and magnetoresistive properties of the La0.6Sr0.3 - x Bi (x) Mn1.1O3 ceramics have been studied. The substitution of Bi ions for Sr ions increases the lattice parameter of the rhombohedral perovskite structure, decreases the metal-semiconductor and ferromagnet-paramagnet phase transition temperatures and the peak of the magnetoresistive effect, and increases the resistivity, approaching the system to the ferroelectric state. The Mn-55 NVR study indicates on the high-frequency Mn3+ a dagger" Mn4+ superexchange and heterogeneity of the valence and magnetic states of manganese due to the nonuniformity of distribution of all ions and defects. The phase diagram has been constructed, which shows a strong correlation between the structural, magnetic, and magnetoresistive properties.
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Missouri Univ Sci & Technol, Dept Phys, Rolla, MO 65409 USAMissouri Univ Sci & Technol, Dept Phys, Rolla, MO 65409 USA
Creel, Thomas F.
Yang, Jinbo
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Peking Univ, State Key Lab Artificial Microstruct & Mesoscop P, Beijing 100871, Peoples R China
Peking Univ, Sch Phys, Beijing 100871, Peoples R ChinaMissouri Univ Sci & Technol, Dept Phys, Rolla, MO 65409 USA
Yang, Jinbo
Kahveci, Mehmet
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Univ Missouri, Dept Phys, Columbia, MO 65211 USAMissouri Univ Sci & Technol, Dept Phys, Rolla, MO 65409 USA
Kahveci, Mehmet
Malik, Satish K.
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Univ Fed Rio Grande Norte UFRN, DFTE, Natal, RN, BrazilMissouri Univ Sci & Technol, Dept Phys, Rolla, MO 65409 USA
Malik, Satish K.
Quezado, S.
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Univ Fed Rio Grande Norte UFRN, DFTE, Natal, RN, BrazilMissouri Univ Sci & Technol, Dept Phys, Rolla, MO 65409 USA
Quezado, S.
Pringle, O. A.
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Missouri Univ Sci & Technol, Dept Phys, Rolla, MO 65409 USAMissouri Univ Sci & Technol, Dept Phys, Rolla, MO 65409 USA
Pringle, O. A.
Yelon, William B.
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Missouri Univ Sci & Technol, Dept Chem, Rolla, MO 65409 USA
Missouri Univ Sci & Technol, Grad Ctr Mat Res, Rolla, MO 65409 USAMissouri Univ Sci & Technol, Dept Phys, Rolla, MO 65409 USA
Yelon, William B.
James, William J.
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Missouri Univ Sci & Technol, Dept Chem, Rolla, MO 65409 USA
Missouri Univ Sci & Technol, Grad Ctr Mat Res, Rolla, MO 65409 USAMissouri Univ Sci & Technol, Dept Phys, Rolla, MO 65409 USA