A submicron soft x-ray active grating monochromator beamline for ultra-high resolution angle-resolved photoemission spectroscopy

Tsai, Huang Ming; Fu, Huang Wen; Kuo, Chang Yang; Liang, Huang; Lee, Chang Sheng; Hua, Chih-Yu; Kao, Kai Yang; Lin, Hong Ji; Fung, H. S.; Chung, S. C.; Chang, C. F.; Chainani, A.; Tjeng, L. H.; Chen, Chien Te

doi:10.1063/1.5084678

Cited by 9 publications

(3 citation statements)

References 18 publications

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“…X-ray absorption spectra (XAS) were measured at the TPS45A beamline 13 of the NSRRC synchrotron (Taiwan). The Cr L 2;3 XAS spectra measured at 300 K for (Cr 0.9 B 0.1 )Te and Cr 2 O 3 , which were used as a reference, are shown in Fig.…”

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Easy-cone magnetic structure in (Cr0.9B0.1)Te

Fecher

Kroder

et al. 2020

Applied Physics Letters

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Although stoichiometric CrTe is difficult to synthesize because of the appearance of Cr vacancies, ferromagnetic Cr 1Àx Te compounds have attracted increasing attention. This work investigates single crystalline (Cr 0.9 B 0.1 )Te with the Cr vacancies filled by B to stabilize the hexagonal crystal structure and shift the Fermi energy. The structural and magnetic properties have been characterized by experimental measurements and ab initio calculations. A collinear spin structure with an easy axis along c is observed at high temperature, whereas the magnetic moments localized at the Cr atoms gradually tilt away from the c-axis below 140 K. A maximum tilt angle of 30 is observed at a temperature of 2 K.

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confidence: 99%

Easy-cone magnetic structure in (Cr0.9B0.1)Te

Fecher

Kroder

et al. 2020

Applied Physics Letters

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“…In addition, a vibrating-sample magnetometer (VSM, Lake Shore 7400 system) was used to observe induced magnetization and M–H loop measurements under the magnetic field ( H ) up to 15 000 Oe. The soft X-ray experiments were performed at the TPS 45A2 beamline , of the National Synchrotron Radiation Research Center in Taiwan. The total electron yield method was used to measure the X-ray absorption and the X-ray magnetic circular dichroism across the Co and Fe L-edge, with left- and right-handed circularly polarized light along with an applied magnetic field of 1.5 T.…”

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Polarized Hole Injection-induced Magnetic Enhancement in Carbon-Encapsulated Cobalt Ferrite Nanoparticles

Lee,

Hung,

Lin

et al. 2023

J. Phys. Chem. C

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Magnetic enhancement was observed in carbon-encapsulated cobalt ferrite (CoFe2O4) nanoparticles. The induced magnetic moment of the nanoparticles was estimated using a vibrating-sample magnetometer and corrected based on thermogravimetric loss. Notably, up to 25% magnetic enhancement was achieved via carbon encapsulation by low-temperature hydrothermal reactions. A systematic variation on Co L-edge absorption spectra revealed the introduction of valence holes owing to carbon encapsulation, and the hole injection was attributed to carbon–sp contact. X-ray magnetic circular dichroism indicates holes injected upon both Fe and Co ions. Specifically, it is observed that the injection of polarized holes into Co2+ ions at the octahedral site results in magnetic enhancement. A spin–split electronic structure analysis of CoFe2O4 based on density functional theory with Hubbard correction demonstrated that octahedral Co, which served as a minority hole reservoir, controlled the magnetic properties of the hybrid system.

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“…In the soft x-ray beamline, a spatial resolution of 100 nm will be realized for the Nano-ARPES endstation, and a 3 µm spatial resolution will be achieved for the soft xray ARPES endstation. In comparison to similar facilities worldwide, [9][10][11][12][13] these technical specifications bring several advantages. Firstly, the high energy resolution of 1 meV allows for detailed investigations of electronic structures and energy bands in quantum materials and devices, [14] and enables researchers to discern subtle electronic properties and uncover new insights into material behavior and device functionalities.…”

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confidence: 99%