High-Magnetic-Field X-ray Absorption Spectroscopy of Field-Induced Valence Transition in EuNi2(Si1-xGex)2

Matsuda, Yasuhiro H.; Inami, Toshiya; Ohwada, Kenji; Murata, Yuto; Nojiri, Hiroyuki; Murakami, Youichi; Mitsuda, Akihiro; Wada, Hirofumi; Miyazaki, Hiroshi; Harada, Issei

doi:10.1143/jpsj.77.054713

Cited by 24 publications

(18 citation statements)

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“…As in the case of YbInCu 4 , the ratio of the intensities of the two absorption peaks determines the Eu valence. The obtained Eu valences are 2.74 at 0 T and 2.47 at 40 T. 77,85) The XMCD spectra show the double-peak structure as observed in the absorption spectra, suggesting that the 5d electrons of both Eu 2þ and Eu 3þ states are magnetically polarized. This observation seems to be unusual since the ground state of Eu 3þ is nonmagnetic (J ¼ 0) and it is likely that there is no reason for such polarization.…”

Section: )mentioning

confidence: 74%

“…In the present case, this normalization significantly affects the field variation in the XMCD intensity because of the large magnetic field dependence of the absorption peak intensity, reflecting a field-induced valence transition. 77,85) The normalized XMCD intensity is defined as P 5d and plotted as a function of magnetic field in Fig. 15(b) states exist.…”

Section: )mentioning

confidence: 99%

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X-ray Diffraction and Absorption Spectroscopy in Pulsed High Magnetic Fields

Matsuda

Inami

2013

J. Phys. Soc. Jpn.

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Recent results of high-magnetic-field X-ray diffraction and absorption spectroscopy experiments using pulsed magnets are reviewed. Pulsed magnetic fields of up to 30-40 T are utilized. Structural changes induced by magnetic fields in rare-earth intermetallic compounds, transition-metal oxides and low-dimensional quantum spin compounds are presented as results of X-ray diffraction experiments. The structural changes are interpreted by several mechanisms such as the interspin distance dependence of exchange interactions, the symmetry change owing to the geometrical frustration effect, and the Jahn-Teller effect. In addition to the Thomson scattering experiment, a magnetic X-ray scattering experiment on TbB 4 has been conducted at 30 T. Regarding X-ray absorption spectroscopy, the valence state transition in magnetic fields is observed in Yb-, Ce-, and Eu-based intermetallic compounds. Magnetic-field-induced changes in the structural and electronic states in transition-metal and rare-earth compounds were investigated using Xray absorption spectra. The microscopic magnetic properties were examined by X-ray magnetic circular dichroism.

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Section: )mentioning

confidence: 74%

Section: )mentioning

confidence: 99%

X-ray Diffraction and Absorption Spectroscopy in Pulsed High Magnetic Fields

Matsuda

Inami

2013

J. Phys. Soc. Jpn.

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“…Fast detectors such as a PIN-photo diode and avalanche photo diode are used for their response frequency over 60-100 MHz. A similar scheme is used for diffraction experiments, where the diffraction angle is scanned step by step [9].…”

Section: Technical Reportsmentioning

confidence: 99%

“…For valence fl uctuation systems, XAS and XMCD have been used as unique tools determining the valence and/or the element-orbital-specifi c magnetic moment. Recently, the magnetic fi eld dependences of Eu-valence and magnetic moments of this system have been evaluated by hard X-ray spectroscopies up to 40-43 T, where the transitions from 2p to 5d shells are probed [9,13]. More recently, soft X-ray spectroscopy in pulsed magnetic fi elds has been examined [14].…”

Section: Application To Valence Fl Uctuation Compoundsmentioning

confidence: 99%