Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7990642 | Journal of Alloys and Compounds | 2018 | 37 Pages |
Abstract
An O 2p itinerant-electron model for magnetic oxides, which is similar to the O 2p hole-carrier model proposed by Alexandrov et al. [Phys. Rev. Lett. 96 (2006) 117003], was used to explain the magnetic and electrical-transport properties of two series of samples with the nominal composition La1âyBayMn1âxFexO3 (0.00â¯â¤â¯xâ¯â¤â¯0.20; yâ¯=â¯0.15, 0.40). The samples were prepared using the sol-gel method, and X-ray diffraction patterns showed that all samples were single-phase ABO3 perovskite structures. The magnetic and electrical-transport properties of the samples were characterized. Interesting phenomena were observed for the magnetic moment, μobs, of the samples at 10â¯K: μobs of the samples with yâ¯=â¯0.15 decreased approximately linearly when the Fe-doping level was increased from zero to xâ¯=â¯0.2. However, there was a characteristic Fe-doping level, xCâ¯=â¯0.10, for the samples with yâ¯=â¯0.40. When xâ¯â¤â¯xC, μobs decreased very slowly; when xâ¯>â¯xC, μobs decreased rapidly. These interesting phenomena suggest that the samples had a canted magnetic structure, but the cant angle of the samples with yâ¯=â¯0.15 was smaller than that of the samples with yâ¯=â¯0.40. These magnetic structures were further confirmed by the electrical-transport properties of the samples.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
J.J. Qian, Z.Z. Li, W.H. Qi, L. Ma, G.D. Tang, Y.N. Du, M.Y. Chen,