Volume 120, Number 2, October 2017
|Number of page(s)||7|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||04 January 2018|
Study of the dependence of the magnetic moment of La1−xSrxMnO3 on the Sr doping level x
1 Hebei Advanced Thin Film Laboratory, Department of Physics, Hebei Normal University Shijiazhuang City, 050024, PRC
2 Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructures and Jiangsu Provincial Laboratory for Nanotechnology, Nanjing University Nanjing, 210093, PRC
3 State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences Beijing 100190, PRC
Received: 23 September 2017
Accepted: 11 December 2017
The dependence of the magnetic moment of the perovskite manganites La1−xSrxMnO3 on the Sr doping level, x, is fitted using an oxygen 2p itinerant electron model for magnetic oxides (i.e., the IEO model), which is similar to the O 2p hole model proposed by Alexandrov et al. (Phys. Rev. Lett., 96 (2006) 117003). According to this IEO model, the itinerant electrons in these manganites are oxygen 2p electrons (or 2p holes) rather than 3d electrons, as assumed in the double-exchange interaction model. Furthermore, the proposed IEO model describes the process by which the itinerant electrons transit along the O2−–Mn2+–O2−–Mn3+–O1− ion chains in La1−xSrxMnO3 (x < 0.15), wherein a 2p hole is present in the outer orbit of the O1− anion and the magnetic moment of the Mn3+ cation is opposite to that of the Mn2+ cation.
PACS: 75.47.Lx – Magnetic oxides / 74.25.Ha – Magnetic properties including vortex structures and related phenomena
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