@article{oai:repo.qst.go.jp:00047981, author = {三井, 隆也 and Imai, Yasuhiko and Hirao, Naohisa and Matsuoka, Takahiro and Nakamura, Yumiko and Sakaki, Kouji and Enoki, Hirotoshi and Ishimatsu, Naoki and Masuda, Ryo and Seto, Makoto and 三井 隆也 and 瀬戸 誠}, journal = {Journal of the Physical Society of Japan}, month = {Nov}, note = {57Fe-polarized synchrotron radiation Mössbauer spectroscopy (PSRMS) with an X-ray phase plate and a nuclear Bragg monochromator was used to study ferrimagnetic GdFe 2 in high-pressure hydrogen. The pressure-dependent spectra clearly showed a two-step magnetic transition of GdFe2. 57Fe-PSRMS with circular polarization gave direct evidence that the Fe moment was directed parallel to the net magnetization of the GdFe2 hydride at 20 GPa. This spin configuration was opposite to that of the initial GdFe2 , suggesting an extreme weakening of the antiferromagnetic interaction between Fe and Gd. 57Fe-PSRMS enables the characterization of the nonuniform properties of iron-based polycrystalline powder alloys. The excellent applicability of 57Fe-PSRMS covers a wide range of scientific fields.}, pages = {123707-1--123707-5}, title = {High-Pressure-Hydrogen-Induced Spin Reconfiguration in GdFe2 Observed by 57Fe-Polarized Synchrotron Radiation Mössbauer Spectroscopy with Nuclear Bragg Monochromator}, volume = {85}, year = {2016} }