Research paperExperimental GrowthExperimental CharacterizationComputational DFTStructural and Magnetic Properties of Co-rich bct Co1−xMnx FilmsSean F Peterson, Yves U IdzerdaarXiv preprint·2025·10.48550/arxiv.2412.02812·arXiv:2412.02812AbstractThin-films of bct Co1−xMnx grown by molecular beam epitaxy on MgO(001) were measured to have an enhanced atomic magnetic moment of 2.52 ± 0.07 µB/atom beyond the pinnacle of the Slater-Pauling curve for Fe1−xCox with a moment of 2.42 µB/atom. The compositional variation of the average total moment for thin-film bct Co1−xMnx alloys is in stark contrast to the historical measurements of bulk fcc Co1−xMnx. Generalized gradient approximation calculations reveal that significant improvements of this ferromagnetic forced bct phase on MgO(001) are possible via substrate selection.Read more
Co-rich bct Co1−xMnx thin film grown by MBE on MgO(001) with Fe buffer and Al cap; representative Co-rich composition in the low-x regime.2 preparations2 characterizations4 properties1 figureExperimentalCo1−xMnxStudied MaterialMgOSubstrate / DielectricFeBuffer LayerAlCapping Or ContactExpand
Co-rich bct Co1−xMnx thin film grown directly or after improved cleaning on MgO(001), without the Fe buffer layer; composition in the x=1/4 regime.2 preparations2 characterizations1 property1 figureExperimentalCo1−xMnxStudied MaterialMgOSubstrate / DielectricAlCapping Or ContactExpand
bct Co1−xMnx film in the x=1/2 regime grown on MgO(001) and measured for atomic moments and RHEED structural retention.2 preparations2 characterizations2 properties1 figureExperimentalCo1−xMnxStudied MaterialMgOSubstrate / DielectricAlCapping Or ContactExpand
Mn-rich bct Co1−xMnx film in the x>0.7 regime on MgO(001), where RHEED disruption indicates collapse of the bct structure.2 preparations2 characterizations1 figureExperimentalCo1−xMnxStudied MaterialMgOSubstrate / DielectricAlCapping Or ContactExpand
DFT-modeled bct Co1−xMnx system used to evaluate Bain deformation and substrate dependence of atomic moments across candidate substrates.No measurements recordedSimulated Supercell DftCo1−xMnxStudied MaterialMgOSubstrate / DielectricGaAsSubstrate / DielectricBaTiO₃Substrate / DielectricSrTiO₃Substrate / DielectricExpand
Research paperExperimental GrowthExperimental CharacterizationComputational DFTStructural and Magnetic Properties of Co-rich bct Co1−xMnx FilmsSean F Peterson, Yves U IdzerdaarXiv preprint·2025·10.48550/arxiv.2412.02812·arXiv:2412.02812AbstractThin-films of bct Co1−xMnx grown by molecular beam epitaxy on MgO(001) were measured to have an enhanced atomic magnetic moment of 2.52 ± 0.07 µB/atom beyond the pinnacle of the Slater-Pauling curve for Fe1−xCox with a moment of 2.42 µB/atom. The compositional variation of the average total moment for thin-film bct Co1−xMnx alloys is in stark contrast to the historical measurements of bulk fcc Co1−xMnx. Generalized gradient approximation calculations reveal that significant improvements of this ferromagnetic forced bct phase on MgO(001) are possible via substrate selection.Read more
Co-rich bct Co1−xMnx thin film grown by MBE on MgO(001) with Fe buffer and Al cap; representative Co-rich composition in the low-x regime.2 preparations2 characterizations4 properties1 figureExperimentalCo1−xMnxStudied MaterialMgOSubstrate / DielectricFeBuffer LayerAlCapping Or ContactExpand
Co-rich bct Co1−xMnx thin film grown directly or after improved cleaning on MgO(001), without the Fe buffer layer; composition in the x=1/4 regime.2 preparations2 characterizations1 property1 figureExperimentalCo1−xMnxStudied MaterialMgOSubstrate / DielectricAlCapping Or ContactExpand
bct Co1−xMnx film in the x=1/2 regime grown on MgO(001) and measured for atomic moments and RHEED structural retention.2 preparations2 characterizations2 properties1 figureExperimentalCo1−xMnxStudied MaterialMgOSubstrate / DielectricAlCapping Or ContactExpand
Mn-rich bct Co1−xMnx film in the x>0.7 regime on MgO(001), where RHEED disruption indicates collapse of the bct structure.2 preparations2 characterizations1 figureExperimentalCo1−xMnxStudied MaterialMgOSubstrate / DielectricAlCapping Or ContactExpand
DFT-modeled bct Co1−xMnx system used to evaluate Bain deformation and substrate dependence of atomic moments across candidate substrates.No measurements recordedSimulated Supercell DftCo1−xMnxStudied MaterialMgOSubstrate / DielectricGaAsSubstrate / DielectricBaTiO₃Substrate / DielectricSrTiO₃Substrate / DielectricExpand
Research paperExperimental GrowthExperimental CharacterizationComputational DFTStructural and Magnetic Properties of Co-rich bct Co1−xMnx FilmsSean F Peterson, Yves U IdzerdaarXiv preprint·2025·10.48550/arxiv.2412.02812·arXiv:2412.02812AbstractThin-films of bct Co1−xMnx grown by molecular beam epitaxy on MgO(001) were measured to have an enhanced atomic magnetic moment of 2.52 ± 0.07 µB/atom beyond the pinnacle of the Slater-Pauling curve for Fe1−xCox with a moment of 2.42 µB/atom. The compositional variation of the average total moment for thin-film bct Co1−xMnx alloys is in stark contrast to the historical measurements of bulk fcc Co1−xMnx. Generalized gradient approximation calculations reveal that significant improvements of this ferromagnetic forced bct phase on MgO(001) are possible via substrate selection.Read more
Co-rich bct Co1−xMnx thin film grown by MBE on MgO(001) with Fe buffer and Al cap; representative Co-rich composition in the low-x regime.2 preparations2 characterizations4 properties1 figureExperimentalCo1−xMnxStudied MaterialMgOSubstrate / DielectricFeBuffer LayerAlCapping Or ContactExpand
Co-rich bct Co1−xMnx thin film grown directly or after improved cleaning on MgO(001), without the Fe buffer layer; composition in the x=1/4 regime.2 preparations2 characterizations1 property1 figureExperimentalCo1−xMnxStudied MaterialMgOSubstrate / DielectricAlCapping Or ContactExpand
bct Co1−xMnx film in the x=1/2 regime grown on MgO(001) and measured for atomic moments and RHEED structural retention.2 preparations2 characterizations2 properties1 figureExperimentalCo1−xMnxStudied MaterialMgOSubstrate / DielectricAlCapping Or ContactExpand
Mn-rich bct Co1−xMnx film in the x>0.7 regime on MgO(001), where RHEED disruption indicates collapse of the bct structure.2 preparations2 characterizations1 figureExperimentalCo1−xMnxStudied MaterialMgOSubstrate / DielectricAlCapping Or ContactExpand
DFT-modeled bct Co1−xMnx system used to evaluate Bain deformation and substrate dependence of atomic moments across candidate substrates.No measurements recordedSimulated Supercell DftCo1−xMnxStudied MaterialMgOSubstrate / DielectricGaAsSubstrate / DielectricBaTiO₃Substrate / DielectricSrTiO₃Substrate / DielectricExpand
Research paperExperimental GrowthExperimental CharacterizationComputational DFTStructural and Magnetic Properties of Co-rich bct Co1−xMnx FilmsSean F Peterson, Yves U IdzerdaarXiv preprint·2025·10.48550/arxiv.2412.02812·arXiv:2412.02812AbstractThin-films of bct Co1−xMnx grown by molecular beam epitaxy on MgO(001) were measured to have an enhanced atomic magnetic moment of 2.52 ± 0.07 µB/atom beyond the pinnacle of the Slater-Pauling curve for Fe1−xCox with a moment of 2.42 µB/atom. The compositional variation of the average total moment for thin-film bct Co1−xMnx alloys is in stark contrast to the historical measurements of bulk fcc Co1−xMnx. Generalized gradient approximation calculations reveal that significant improvements of this ferromagnetic forced bct phase on MgO(001) are possible via substrate selection.Read more
Co-rich bct Co1−xMnx thin film grown by MBE on MgO(001) with Fe buffer and Al cap; representative Co-rich composition in the low-x regime.2 preparations2 characterizations4 properties1 figureExperimentalCo1−xMnxStudied MaterialMgOSubstrate / DielectricFeBuffer LayerAlCapping Or ContactExpand
Co-rich bct Co1−xMnx thin film grown directly or after improved cleaning on MgO(001), without the Fe buffer layer; composition in the x=1/4 regime.2 preparations2 characterizations1 property1 figureExperimentalCo1−xMnxStudied MaterialMgOSubstrate / DielectricAlCapping Or ContactExpand
bct Co1−xMnx film in the x=1/2 regime grown on MgO(001) and measured for atomic moments and RHEED structural retention.2 preparations2 characterizations2 properties1 figureExperimentalCo1−xMnxStudied MaterialMgOSubstrate / DielectricAlCapping Or ContactExpand
Mn-rich bct Co1−xMnx film in the x>0.7 regime on MgO(001), where RHEED disruption indicates collapse of the bct structure.2 preparations2 characterizations1 figureExperimentalCo1−xMnxStudied MaterialMgOSubstrate / DielectricAlCapping Or ContactExpand
DFT-modeled bct Co1−xMnx system used to evaluate Bain deformation and substrate dependence of atomic moments across candidate substrates.No measurements recordedSimulated Supercell DftCo1−xMnxStudied MaterialMgOSubstrate / DielectricGaAsSubstrate / DielectricBaTiO₃Substrate / DielectricSrTiO₃Substrate / DielectricExpand
