1. Magnetic dilution and electronic nature in La0.7Pb0.3Mn1−xZnxO3
- Author
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Kanoh, Tadahiko and Matoba, Masanori
- Subjects
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MAGNETORESISTANCE , *MAGNETIC properties , *ELECTRONIC structure - Abstract
We have studied the magnetic dilution and electronic nature of Zn doping on the Mn site in the colossal magnetoresistant material La0.7Pb0.3MnO3
(x≤0.3). Small non-magnetic Zn2+ doping tends to separate the system into ferromagnetic clusters to weaken the long-range ferromagnetic order and to reduce the Curie temperature. The spin polarizability of thex=0–0.3 samples is estimated to be 0.97–1.00, indicating that thex=0–0.3 samples are the spin polarized materials in which the conductivity is dominated by single-spin charge carriers. Small doping(x≥0.1) induces the metal–insulator transition and destroys the metallic state with long-range ferromagnetic order. [Copyright &y& Elsevier]- Published
- 2002
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