Commissioning of the soft x-ray undulator beamline at the Siam Photon Laboratory

Nakajima, Hideki; Chaichuay, Sarunyu; Sudmuang, Porntip; Rattanasuporn, Surachet; Jenpiyapong, Watcharapon; Supruangnet, Ratchadaporn; Chanlek, Narong; Songsiriritthigul, Prayoon

doi:10.1063/1.4952819

Cited by 8 publications

(4 citation statements)

References 7 publications

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“…VSM measurements were performed on the Quantum Design VersaLab to investigate the magnetic properties. The elemental composition was analyzed by XPS at the synchrotron beamline 3.2 of SLRI [12].…”

Section: Experimental Methodsmentioning

confidence: 99%

Effect of Mn grinding time on structural, chemical, and magnetic properties of the Manganese Bismuth prepared by sintering in vacuum

Ngamsomrit

Eknapakul

Pinitsoontorn

et al. 2023

J. Phys.: Conf. Ser.

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This work reports the changes in structural, chemical, and magnetic properties of the low-temperature phase manganese bismuth (LTP-MnBi) sintered from mixtures of Bi and Mn ball-milled for different times. The milling time was varied from 1 to 15 hr to produce Mn powder with different particle sizes. The average particle size reduced from ~400 µm (original size) to 35 ± 5 µm and 6 ± 2 µm after 1 and 15 hr milling times, respectively. The LTP-MnBi powder was sintered at 275 °C at vacuum pressure below 5 × 10−7 mbar for 12 hours. By increasing the Mn grinding time, the maximum energy product ((BH)max) of LTP-MnBi decreased from 1.98 ± 0.05 to 1.59 ± 0.07 MGOe, and the saturation magnetization (M s) decreased from 53.42 ± 0.90 to 44.32 ± 0.72 emu/g. The x-ray diffraction patterns indicated the reduction of LTP-MnBi content as a function of the milling time, which is agreed with the decrease in the M s value. This is supported by the x-ray photoelectron results, which also showed the increment of Mn oxides on the surface as a function of Mn milling time. The unexpected decrease in M s, which results in a significant reduction of magnetic performance, might be due to the presence of the oxides preventing diffusion during sintering.

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Section: Experimental Methodsmentioning

confidence: 99%

Effect of Mn grinding time on structural, chemical, and magnetic properties of the Manganese Bismuth prepared by sintering in vacuum

Ngamsomrit

Eknapakul

Pinitsoontorn

et al. 2023

J. Phys.: Conf. Ser.

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“…The magnetic properties were investigated by using the vibrating sample magnetometry (VSM, Quantum Design, VersaLab) with an applied magnetic field up to ±3T. The chemical composition was investigated by x-ray photoelectron spectroscopy (XPS) at Beamline 3.2, Synchrotron Light Research Institute [6].…”

Section: Experimental Methodsmentioning

confidence: 99%

Influence of glycine addition on formation and magnetic properties of MnBi prepared by vacuum sintering technique

Eknapakul

Ngamsomrit

Pinitsoontorn

et al. 2023

J. Phys.: Conf. Ser.

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An alternative way to increase a low-temperature phase MnBi (LTP-MnBi) content synthesized by low-temperature vacuum sintering is by using Mn powder with small particle sizes. To reduce the particle size by ball milling, glycine was added to prevent particle agglomeration and possible oxide formation. The ball-milled Mn and Bi powders were fixed at an atomic ratio of 1:1. The ball-milling time in glycine was between 1 and 3 hrs. The average particle size reduces from 400 µm (original) to 35-40 µm and 15-20 µm after grinding for 1 and 3 hr, respectively. Sintering of the mixtures was carried out at 275 °C for 12 hours at a vacuum pressure of less than 5×10−8 mbar. The LTP-MnBi samples sintered from 1 hr (MnG1Bi) and 3 hr (MnG3Bi) glycine-added Mn grinding times were investigated by XRD, SEM, XPS, and VSM. The coercivity values (H c) are 3.95 ± 0.04 and 2.35 ± 0.03 kOe for MnG1Bi and MnG3Bi, respectively. The saturation magnetization (M s) of MnG1Bi and MnG3Bi is relatively low (~0.18 emu/g) compared to the samples prepared by conventional ball-milling, i.e., without adding glycine in grinding. The XRD results show a few percentages of MnBi content in all samples, suggesting that glycine addition could prevent MnBi formation. The coverage of hydrocarbon (i.e., NH2-CH2-COOH) groups on Mn particles could prevent the diffusion mechanism during liquid-phase sintering. Moreover, it was found that the oxygen and carbon content in the MnGxBi were much higher than the conventional ball-milled MnBi.

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“…The ultraviolet and X-ray photoemission spectroscopy (UPS and XPS) were performed at BL3.2Ua in the Synchrotron Light Research Institute, Nakhon Ratchasima, Thailand. The beamline delivers the soft X-rays ranging from 40 to 1040 eV linearly polarized [20]. The incident angle is 20 degrees and its polarization is usually parallel to the surface.…”

Section: Methodsmentioning

confidence: 99%

Fabrication and Characterization of Ag–Ta Thin Films by Co-Magnetron Sputtering as Alternative Layer for High Reflection of NIR Radiation

et al. 2022

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Silver–tantalum (Ag–Ta) thin films were fabricated by magnetron co-sputtering on silicon (Si) wafer (100) and glass slide substrates at room temperature. The Ag–Ta thin films were prepared at various deposition times of 5, 10, 20 and 30 s and the physical, structural and optical properties of the Ag–Ta thin films were investigated. It was determined that the thicknesses of the films were 7, 9, 17 and 33 nm, respectively. The results revealed that an increase in the film thickness leads to a monotonic increase in FCC and BCC phase of Ag and Ta, respectively. The work function and stoichiometric of the Ag–Ta thin films were investigated by ultraviolet and X-ray photoemission spectroscopies (UPS and XPS), respectively. The potential of Ag–Ta thin films to be used as low-emission coating was investigated using a spectrophotometer. A UV–VIS–NIR spectrophotometer was used to measure the spectral reflectance in the wavelength range from 300 to 2000 nm. The results showed that the Ag–Ta thin film deposited for 30 s exhibited higher reflectance in NIR region than those of 5, 10, 20 and 30 s. It demonstrated an average reflectance of about 80% and slightly decreased to 75% after being kept in the air atmosphere for 28 days. It can be likewise proposed as an alternative thin film with high reflectance of NIR radiation single layer to develop industrial low-emission coating for cost-effective, clean, and easy adaptation to a large area coating.

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Commissioning of the soft x-ray undulator beamline at the Siam Photon Laboratory

Cited by 8 publications

References 7 publications

Effect of Mn grinding time on structural, chemical, and magnetic properties of the Manganese Bismuth prepared by sintering in vacuum

Effect of Mn grinding time on structural, chemical, and magnetic properties of the Manganese Bismuth prepared by sintering in vacuum

Influence of glycine addition on formation and magnetic properties of MnBi prepared by vacuum sintering technique

Fabrication and Characterization of Ag–Ta Thin Films by Co-Magnetron Sputtering as Alternative Layer for High Reflection of NIR Radiation

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