Anisotropic magnetization and electronic structure of the first-order ferrimagnet ErCo.sub.2./sub. studied by polarization dependent hard X-ray photoemission spectroscopy

0566225 - FZÚ 2024 RIV NL eng J - Journal Article
Abozeed, A.A. - Gorbunov, D.I. - Kadono, T. - Kanai-Nakata, Y. - Yamagami, K. - Fujiwara, H. - Sekiyama, A. - Higashiya, A. - Yamasaki, A. - Tamasaku, K. - Yabashi, M. - Ishikawa, T. - Wada, H. - Andreev, Alexander V. - Imada, S.
Anisotropic magnetization and electronic structure of the first-order ferrimagnet ErCo₂ studied by polarization dependent hard X-ray photoemission spectroscopy.
Physica B-Condensed Matter. Roč. 649, Jan (2023), č. článku 414465. ISSN 0921-4526. E-ISSN 1873-2135
R&D Projects: GA ČR(CZ) GA21-09766S
Institutional support: RVO:68378271
Keywords : first-order ferrimagnetic transition * metamagnetism * hard x-ray photoemission spectroscopy * (HAXPES) * polarization dependent photoemission * band structure * coherent potential approximation (CPA)
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 2.8, year: 2022
Method of publishing: Open access

The first-order ferrimagnet ErCo2 attracts interest not only because of metamagnetism and magnetocaloric effect just above TC = 32–34 K but also because it is closely related with the itinerant metamagnetism of YCo2 and LuCo2. We study the electronic structure of single crystals with hard X-ray photoemission spectroscopy. Calculated ErCo2 band structures of the ferrimagnetic and paramagnetic phases are presented in detail. In the ferrimagnetic state, the density of states just below Fermi energy is smaller than in the paramagnetic phase. Valence band spectra in the paramagnetic state show strong polarization dependence. The change across the first-order ferrimagnetic transition in the valence band electronic structures is observed. These experimental data are well described by the band structure calculation incorporated with the polarization dependent cross-sections of orbitals.
Permanent Link: https://hdl.handle.net/11104/0341683