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Magnetic and structural properties of Mn5+xGe3+y thin films as a function of substrate orientation

Autor: D. H. Mosca, Y. Zheng, J. Varalda, R. Cardoso de Oliveira, Dominique Demaille, Nicolas Casaretto, Massimiliano Marangolo

Publikováno v: Journal of Magnetism and Magnetic Materials
Journal of Magnetism and Magnetic Materials, Elsevier, 2021, 539, pp.168325. ⟨10.1016/j.jmmm.2021.168325⟩

International audience; Mn 5 Ge 3 thin films were grown on GaAs(1 1 1) and GaAs(0 0 1) by Molecular Beam Epitaxy (MBE). The influence of stoichiometry and alloying of the samples was investigated using different Mn diffusion cell temperatures for eac

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f03f8cb915dd421923fe820c566bb112
https://hal.archives-ouvertes.fr/hal-03323467

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Initial stages of the epitaxial growth of MnN on the GaAs (001)-(2 × 2) surface: First-principle study

Autor: Jonathan Guerrero-Sanchez, R. Ponce-Pérez, S.J. Gutierrez-Ojeda, Gregorio H. Cocoletzi, J. Varalda, M.T. Romero de la Cruz

Publikováno v: Applied Surface Science. 489:639-647

First-principle total-energy calculations have been employed to investigate the epitaxial growth of manganese nitride (MnN) on the non-reconstructed GaAs (001)-(2 × 2) surface. Also, we have studied the surface nitridation process proposed by Gwo an

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::770fe16b4ae6799c0f632708b073c1d4
https://doi.org/10.1016/j.apsusc.2019.06.047

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Strain-induced magnetization changes and magneto-volume effects in ferromagnets with cubic symmetry

Autor: D. H. Mosca, V. Z. C. Paes, J. Varalda

Publikováno v: Journal of Magnetism and Magnetic Materials. 475:539-543

Field-induced magnetization changes and magnetovolumetric strain in bulk ferromagnetic materials with cubic crystalline structure are investigated. Semi-phenomenological approach is developed using a minimal parametrization of the magnetic moment cha

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::167b3ef61ddbdbb2408c85ebc53543a3
https://doi.org/10.1016/j.jmmm.2018.11.102

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Oxygen diffusion and vacancy migration thermally-activated govern high-temperature magnetism in ceria

Autor: P.C. de Camargo, D. H. Mosca, A. J. A. de Oliveira, J. Varalda, Cesar Augusto Dartora

Publikováno v: Scientific Reports, Vol 9, Iss 1, Pp 1-9 (2019)
Scientific Reports

Several experimental works currently demonstrate that metallic nano-oxides and carbon nanomaterials expected to be diamagnets, in fact, behave as ferromagnets at room temperature. More than scientifically intriguing, this unconventional and unexpecte

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f817704cad01e800ff2f5a0e3efdb640
http://link.springer.com/article/10.1038/s41598-019-41157-6

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Effect of Thermal Annealing on the Stoichiometry and Magnetism of Mn–Ga Thin Films

Autor: C. da Cruz, D. H. Mosca, R. C. de Oliveira, J. Varalda, I.T. Neckel

Publikováno v: The Journal of Physical Chemistry C. 123:5583-5590

MnxGa thin films (1.64 ≤ x ≤ 2) were grown at room temperature by molecular beam epitaxy on the native SiO2 layer of Si(100) commercial wafers. After growth, MnxGa films were thermally annealed at different temperatures (200, 300, and 400 °C). T

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::68297e748dbca5a965c7d4c57f8519ff
https://doi.org/10.1021/acs.jpcc.8b08893

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