High Curie temperature Mn 5 Ge 3 thin films produced by non-diffusive reaction

E. Assaf (1) , A. Portavoce (1) , K. Hoummada (1) , M. Bertoglio (1) , Sylvain Bertaina (1)

1 IM2NP - Institut des Matériaux, de Microélectronique et des Nanosciences de Provence

Polycrystalline Mn 5 Ge 3 thin films were produced on SiO 2 using magnetron sputtering and reactive diffusion (RD) or non-diffusive reaction (NDR). In situ X-ray diffraction and atomic force microscopy were used to determine the layer structures, and magnetic force microscopy, superconducting quantum interference device and ferromagnetic resonance were used to determine their magnetic properties. RD-mediated layers exhibit similar magnetic properties as MBE-grown monocrystalline Mn 5 Ge 3 thin films, while NDR-mediated layers show magnetic properties similar to monocrystalline C-doped Mn 5 Ge 3 C x thin films with 0.1  x  0.2. NDR appears as a CMOS-compatible efficient method to produce good magnetic quality high-curie temperature Mn 5 Ge 3 thin films.

Mots clés: Germanium; Manganese; thin film; ferromagnetic; reaction *

Domaines: Electrons fortement corrélés [cond-mat.str-el]

E. Assaf, A. Portavoce, K. Hoummada, M. Bertoglio, Sylvain Bertaina. High Curie temperature Mn 5 Ge 3 thin films produced by non-diffusive reaction. Applied Physics Letters, 2017, 110 (7), ⟨10.1063/1.4976576⟩. ⟨hal-01473345⟩