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- W2017756730 abstract "(La1−xPbx)1−y□yMnO3 with x=0.05–0.5 and y=0, 0.05, 0.1 (where □ is a vacancy) was studied to evaluate the effects of A-site vacancies on the physical properties. In this system manganese perovskites form with tolerance factors close to 1 and low A-site cation size mismatch due to similarities in the effective ionic radii of La3+ and Pb2+. Increasing vacancy concentration indicates no significant effect on the lattice parameters or volume. However, the vacancies introduce a greater A-site cation size mismatch, which leads to a lowering of the ferromagnetic and metal–insulator transition temperatures, although the transitions are not broadened with increasing vacancy content. Due to the vacancies a distribution of Mn–O–Mn angles and Mn–O distances are created, and long range order in (La1−xPbx)1−y□yMnO3 appears to be determined by Mn–O–Mn angles and Mn–O distances which most distort from 180° and are the longest, respectively, in the structure." @default.
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- W2017756730 date "2003-10-01" @default.
- W2017756730 modified "2023-10-14" @default.
- W2017756730 title "Effects of vacancy concentration on the magnetic and transport properties of (La1−xPbx)1−y□yMnO3" @default.
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- W2017756730 doi "https://doi.org/10.1016/s0022-4596(03)00135-x" @default.
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