
Absorption spectroscopy and XMCD at the Verwey transition of Fe3O4
2007年3月1日 · We will show detailed and angular-dependent magnetic (XMCD) and nonmagnetic (XAS) absorption spectroscopy results of a high-quality single crystal, comparing cleaved and polished surfaces from the same single crystal.
An X-ray magnetic circular dichroism (XMCD) study of Fe ordering …
2016年6月1日 · Fe L2,3-edge XAS and XMCD studies have been used to unravel structural trends in the MgAl2O4–Fe3O4 solid solution where thermodynamic modeling.
Anomalous magnetic properties of Fe3O4 nanostructures on GaAs …
2019年7月15日 · XMCD studies divulge the unusual high magnetization value of ∼5.1 μ B /FU in 2 nm film compared to 3.9 μ B /FU observed for bulk Fe 3 O 4 or thicker Fe 3 O 4 films. The excess moment is shown to be due to orbital moment contribution.
X射线磁圆二色性研究SiO2包覆Fe3O4纳米复合材料轨道磁矩增强 …
基于同步加速器的元素特异性软X射线吸收光谱和X射线磁圆二色性(XMCD)技术已参与体敏感总荧光产量模式,以了解SiO 2 @Fe 3 O 4 NCs中磁化的起源。 通过XMCD测定Fe 3 O 4的磁化滞后。 在室温下,磁矫顽力(H c)高达1 T,比薄膜的值高出约2倍,比纳米粒子的磁矫顽力高出约5倍。 对于H c从 1 T 扩展至 3 T的非相互作用单域 NP ,Stoner-Wohlfarth 模型为滞后曲线提供了有趣的解释。 这些曲线确定了样品中存在的 Fe 氧化物的不同成分,从而导出了 Fe 每种氧化态中 …
Reversed ageing of Fe3O4 nanoparticles by hydrogen plasma
2016年2月23日 · Magnetite (Fe 3 O 4) nanoparticles suffer from severe ageing effects when exposed to air even when they are dispersed in a solvent limiting their applications. In this work, we show that this...
Spin and Orbital Moments and Magnetic Order in Fe3O4 …
2014年3月18日 · X-ray Magnetic Circular Dichroism (XMCD) measurements of these nanoparticles were measured at 80 K and 300 K. By using the sum rules, spin and orbital magnetic moments were calculated from the XMCD signal. The results confirm a quenching orbital moment and a large spin moment.
Spin canting across core/shell Fe3O4/MnxFe3−xO4 nanoparticles ...
2018年2月21日 · We study ~7.4 nm diameter, core/shell Fe 3 O 4 /Mn x Fe 3−x O 4 MNPs with a 0.5 nm Mn-ferrite shell. Mössbauer spectroscopy, x-ray absorption spectroscopy and x-ray magnetic circular dichroism...
x-ray magnetic circular dichroism (备忘) - 知乎 - 知乎专栏
x射线磁圆二色性(X-ray magnetic circular dichroism, XMCD)光谱是两个 X 射线吸收光谱(X-ray absorption spectra, XAS)在磁场中的差谱,一个是用左圆偏振光,一个是用右圆偏振光。
合成 MgAl2O4-Fe3O4(尖晶石-磁铁矿)固溶体系列中 Fe 排序的 X 射线磁圆二色性 (XMCD…
摘要 Fe L2,3-edge XAS 和 XMCD 研究已被用于揭示 MgAl2O4-Fe3O4 固溶体的结构趋势,其中由于端元的复杂排序排列,热力学建模提出了挑战。Fe3+ 和 Fe2+ 在四面体 (Td) 和八面体 (Oh) 位点之间的分配已经建立。
Origin of Magnetization in Silica-coated Fe3O4 Nanoparticles
2022年4月18日 · We have performed XMCD measurements, which is a powerful element-specific technique to find out the origin of magnetization in SiO2-coated Fe3O4 NPs, that verified a decrease in magnetization with increasing thickness of the SiO2 coating.
- 某些结果已被删除