The origin of ferromagnetism in the two different phases of LaMn0.5Co0.5O3: evidence from x-ray photoelectron spectroscopic studies
The origin of ferromagnetism in the two different phases of LaMn0.5Co0.5O3: evidence from x-ray photoelectron spectroscopic studies
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DOI：
10.1088/0953-8984/13/4/311
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发表时间：
2001-01
期刊：
影响因子：
--
通讯作者：
V. Joly;P. Joy;S. Date;C. Gopinath
中科院分区：
文献类型：
--
作者：
V. Joly;P. Joy;S. Date;C. Gopinath
核心水平的Mn和Co的2 p X射线光电子能谱的研究提供了证据，为不同的自旋态的Mn和Co在两个不同的阶段的铁磁化合物LaMn0.5Co0.5O3。高Tc（Tc？230？K）相是由Mn ~（3+）-O-Mn ~（3+）超交换作用引起的，而在低Tc（Tc？150？K）相Mn ~（4+）-O-Co ~（2+）超交换作用是铁磁性的主要原因。
Core-level Mn and Co 2p x-ray photoelectron spectroscopic studies give evidence for different spin states of Mn and Co in the two different phases of the ferromagnetic compound LaMn0.5Co0.5O3. Ferromagnetism in the high-Tc (Tc?230?K) phase of the compound arises from Mn3+-O-Mn3+ superexchange interactions, whereas in the low-Tc (Tc?150?K) phase Mn4+-O-Co2+ superexchange interactions are responsible for the ferromagnetism.