The double perovskite La 2 FeMnO 6 is ideally expected to be a ferrimagnet with a low saturation moment of 1 μ B / f.u. Inhomogeneity in the Fe/Mn sites, along with other lattice disorders, can modify the exchange interactions in the material and result in a net saturation moment of more than 1 μ B / f.u. Here, the origin of complicated magnetic behavior is examined of a pure phase La 2 FeMnO 6 sample prepared by the sol-gel method. XRD analysis established that the material crystallizes in the orthorhombic Pbnm symmetry. The comprehensive analysis of x-ray photoelectron spectroscopy, x-ray near edge structure, and magnetic measurements acknowledge an antiferromagnetic coupling between Fe 3+ and Mn 3+ cations, thereby, resulting in the ferrimagnetic ground state for La 2 FeMnO 6 . The magnetic hysteresis loop obtained at 5 K shows a large coercivity of ~820 Oe and a s...

中文翻译：

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La 2 FeMnO 6双钙钛矿中部分有序玻璃和格里菲斯状相的证据

理想的是，双钙钛矿La 2 FeMnO 6是一种铁磁体，具有低的饱和磁矩1μB / fu Fe / Mn位点中的不均匀性以及其他晶格紊乱，可以改变材料中的交换相互作用并导致净饱和力矩大于1μB / fu在此，研究了通过溶胶凝胶法制备的纯相La 2 FeMnO 6样品的复杂磁行为的起源。XRD分析证实该材料以正交Pbnm对称性结晶。对X射线光电子能谱，X射线近边缘结构以及磁测量的综合分析表明，Fe 3+和Mn 3+阳离子之间存在反铁磁耦合，从而导致La 2 FeMnO 6处于亚铁磁基态。