| Article | |
| Title | Compositional Dependence of Epitaxial L 1 0 ‐Mn x Ga Magnetic Properties as Probed by 57 Mn/Fe and 119 In/Sn Emission Mössbauer Spectroscopy |
| Author(s) | Unzueta, Iraultza (Basque U., Bilbao) ; Gunnlaugsson, Haraldur Pall (Iceland U.) ; Mølholt, Torben Esmann (CERN) ; Masenda, Hilary (U. Witwatersrand, Johannesburg, Sch. Phys.) ; Mokhles Gerami, Adeleh (IPM, Tehran) ; Krastev, Petko (Sofiya, Inst. Nucl. Res.) ; Zyabkin, Dmitry V (Ilmenau Tech. U.) ; Bharuth-Ram, Krish (KwaZulu Natal U.) ; Naidoo, Deena (U. Witwatersrand, Johannesburg, Sch. Phys.) ; Ólafsson, Sveinn (Iceland U.) ; Plazaola, Fernando (U. Basque Country, Leioa) ; Schell, Juliana (U. Duisburg-Essen) ; Qi, Bingcui (Iceland U.) ; Zhao, Xupeng (CAS, Beijing) ; Xiao, Jiaxing (CAS, Beijing) ; Zhao, Jianhua (CAS, Beijing) ; Mantovan, Roberto (CNR-IMM, Catania) |
| Publication | 2022 |
| Number of pages | 11 |
| In: | Phys. Status Solidi B 259 (2022) 2200121 |
| DOI | 10.1002/pssb.202200121 |
| Subject category | Nuclear Physics - Experiment |
| Accelerator/Facility, Experiment | CERN ISOLDE |
| Abstract | The magnetic properties of MnxGa alloys critically depend on compositionx, andthe atomic-scale origin of those dependences is still not fully disclosed. Molecularbeam epitaxy has been used to produce a set of MnxGa samples (x¼0.7÷1.9)with strong perpendicular magnetic anisotropy, and controllable saturationmagnetization and coercivefield depending onx. By conducting57Mn/Fe and119In/Sn emission Mössbauer spectroscopy at ISOLDE/CERN, the Mn and Gasite-specific chemical, structural, and magnetic properties of MnxGa are inves-tigated as a function ofx, and correlated with the magnetic properties asmeasured by superconducting quantum interference device magnetometry.Hyperfine magneticfields of Mn/Fe (either at Mn or Ga sites) are found to begreatly influenced by the local strain induced by the implantation. However,In/Sn probes show clear angular dependence, demonstrating a huge transferreddipolar hyperfinefield to the Ga sites. A clear increase of the occupancy of Galattice sites by Mn forx>1 is observed, and identified as the origin for theincreased antiferromagnetic coupling between Mn and Mn at Ga sites that lowersthe samples’magnetization. The results shed further light on the atomic-scalemechanisms driving the compositional dependence of magnetism in MnxGa. |
| Copyright/License | publication: © 2022-2024 The Authors (License: CC-BY-4.0) |
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Notice créée le 2023-03-17, modifiée le 2023-03-21
