Details

Autor(en) / Beteiligte

• Nazmunnahar, M
• Ryba, T
• del Val, J J
• Ipatov, M
• Gonzalez, J
• Haskova, V
• Szabo, P
• Samuely, P
• Kravcak, J
• Vargova, Z
• Varga, R

Titel

Half-metallic Ni sub(2)MnSn Heusler alloy prepared by rapid quenching

Ist Teil von

• Journal of magnetism and magnetic materials, 2015-07, Vol.386, p.98-101

Erscheinungsjahr

2015

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• We have employed melt-spinning method to produce Ni sub(2)MnSn-based half-metallic Heusler alloy. It allows fast and simple production of large amount of materials in a single production step avoiding high temperature post-production annealing. Microstructural, magnetic and spin polarization study of Ni sub(2)MnSn ribbon is used for characterization. SEM analysis reveals the polycrystalline structure with the columnar crystals grown perpendicularly to the ribbon plane. A single-phase austenite with L2 sub(1) structure was confirmed by X-ray. Magnetic measurements shows the ordinary ferromagnetic behavior with Curie temperature 344 K and magnetic moment 4.08 mu sub(B)/f.u. Particular crystal structure leads to the well defined anisotropy having an easy plane in the ribbon's plane. Finally, the spin polarization parameter P sub(0) estimated by Point-Contact Andreev-reflection Spectroscopy is varying in the range 40-70% for Ni sub(2)MnSn which is comparable with other values reported earlier for other Heusler alloys.