Structural, magnetic and electrical properties of sputter deposited Mn-Fe-Ga thin films

Abstract

We investigated structural, magnetic and electrical properties of sputter deposited Mn-Fe-Ga compounds. The crystallinity of the Mn-Fe-Ga thin films was confirmed using x-ray diffraction. X-ray reflection and atomic force microscopy measurements were utilized to investigate the surface properties, roughness, thickness and density of the deposited Mn-Fe-Ga. Depending on the stoichiometry, as well as the used substrates (SrTiO3 (001) and MgO (001)) or buffer layer (TiN) the Mn-Fe-Ga crystallizes in the cubic or the tetragonally distorted phase. Anomalous Hall effect and alternating gradient magnetometry measurements confirmed strong perpendicular magnetocrystalline anisotropy. Low saturation magnetization and hard magnetic behavior was reached by tuning the composition. Temperature dependent anomalous Hall effect measurements in a closed cycle He-cryostat showed a slight increase in coercivity with decreasing temperature (300K to 2K). TiN buffered Mn2.7Fe0.3Ga revealed sharper switching of the magnetization compared to the unbuffered layers.

References in corpus (3)

• Guidelines for understanding cubic manganese-rich Heusler compounds
• Inverted spin polarization of Heusler alloys for new spintronic devices
• Titanium Nitride as a Seed Layer for Heusler Compounds

Cited by in corpus (3)

• First principles study of the structural phase stability and magnetic order in various structural phases of Mn${}_2$FeGa
• Structure, site-specific magnetism and magneto-transport properties of epitaxial D0${}_{22}$ Mn${}_2$Fe${}_x$Ga thin films
• Heteroepitaxial growth of tetragonal Mn${}_{2.7-x}$Fe${}_x$Ga${}_{1.3}$ (0 $⩽$ x $⩽$ 1.2) Heusler films with perpendicular magnetic anisotropy