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The magnetic properties of Mn x Ga alloys critically depend on composition x, and the atomic‐scale origin of those dependences is still not fully disclosed. Molecular beam epitaxy has been used to produce a set of Mn x Ga samples (x = 0.7 ÷ 1.9) with strong perpendicular magnetic anisotropy, and controllable saturation magnetization and coercive field depending on x. By conducting 57Mn/Fe and 119In/Sn emission Mössbauer spectroscopy at ISOLDE/CERN, the Mn and Ga site‐specific chemical, structural, and magnetic properties of Mn x Ga are investigated as a function of x, and correlated with the magnetic properties as measured by superconducting quantum interference device magnetometry. Hyperfine magnetic fields of Mn/Fe (either at Mn or Ga sites) are found to be greatly influenced by the local strain induced by the implantation. However, In/Sn probes show clear angular dependence …
Publication date: 
1 Jul 2022

Iraultza Unzueta, Haraldur Pall Gunnlaugsson, Torben Esmann Mølholt, Hilary Masenda, Adeleh Mokhles Gerami, Petko Krastev, Dmitry V Zyabkin, Krish Bharuth-Ram, Deena Naidoo, Sveinn Ólafsson, Fernando Plazaola, Juliana Schell, Bingcui Qi, Xupeng Zhao, Jiaxing Xiao, Jianhua Zhao, Roberto Mantovan

Biblio References: 
Volume: 259 Issue: 7 Pages: 2200121
physica status solidi (b)