TY - JOUR
T1 - Rare-earth fourth-order multipole moment in cubic ErCo2Probed by linear dichroism in core-level photoemission
AU - Abozeed, Amina A.
AU - Kadono, Toshiharu
AU - Sekiyama, Akira
AU - Fujiwara, Hidenori
AU - Higashiya, Atsushi
AU - Yamasaki, Atsushi
AU - Kanai, Yuina
AU - Yamagami, Kohei
AU - Tamasaku, Kenji
AU - Yabashi, Makina
AU - Ishikawa, Tetsuya
AU - Andreev, Alexander V.
AU - Wada, Hirofumi
AU - Imada, Shin
N1 - Funding Information:
Acknowledgment We are grateful to K. Kuga, M. Murata, S. Taniguchi, M. Iwano, C. Morimoto, K. Sakamoto, S. Fujioka, S. Hamamoto, and K. Nakagawa for experimental support. The HAXPES was performed under the approval of JASRI (Proposal No. 2015A1533). This work was supported by the Materials Growth and Measurement Laboratory (https://mgml.eu) and by grant 16-03593S from the Czech Science Foundation. This work was also supported by Grants-in-Aid for Scientific Research on Innovative Areas “J-Physics” (JP16H01074) from MEXT, Japan and for Scientific Research (JP16H04014) from JSPS, Japan. A. A. Abozeed was supported by an Otsuki memorial scholarship for Asian and African countries. Y. Kanai was supported by the JSPS Research Fellowships for Young Scientists.
Publisher Copyright:
©2018 The Physical Society of Japan.
PY - 2018
Y1 - 2018
N2 - We developed a method to experimentally quantify the fourth-order multipole moment of the rare-earth 4f orbital. Linear dichroism (LD) in the Er 3d5=2 core-level photoemission spectra of cubic ErCo2 was measured using bulk-sensitive hard X-ray photoemission spectroscopy. Theoretical calculation reproduced the observed LD, and the result showed that the observed result does not contradict the suggested38 ground state. Theoretical calculation further showed a linear relationship between the LD size and the size of the fourth-order multipole moment of the Er3+ ion, which is proportional to the expectation value hO04 þ 5O44i, where Omn are the Stevens operators. These analyses indicate that the LD in 3d photoemission spectra can be used to quantify the average fourth-order multipole moment of rare-earth atoms in a cubic crystal electric field.
AB - We developed a method to experimentally quantify the fourth-order multipole moment of the rare-earth 4f orbital. Linear dichroism (LD) in the Er 3d5=2 core-level photoemission spectra of cubic ErCo2 was measured using bulk-sensitive hard X-ray photoemission spectroscopy. Theoretical calculation reproduced the observed LD, and the result showed that the observed result does not contradict the suggested38 ground state. Theoretical calculation further showed a linear relationship between the LD size and the size of the fourth-order multipole moment of the Er3+ ion, which is proportional to the expectation value hO04 þ 5O44i, where Omn are the Stevens operators. These analyses indicate that the LD in 3d photoemission spectra can be used to quantify the average fourth-order multipole moment of rare-earth atoms in a cubic crystal electric field.
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U2 - 10.7566/JPSJ.87.033710
DO - 10.7566/JPSJ.87.033710
M3 - Article
AN - SCOPUS:85043226826
SN - 0031-9015
VL - 87
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
IS - 3
M1 - 033710
ER -