Transversal magneto-resistance in epitaxial Fe₃O₄ and Fe₃O₄/NiO exchange biased system

Magnetic and transport properties of epitaxial stepped Fe3O4(100) thin films

“…Details of the film growth is given elsewhere. 19,26,27 Figure 1 Fig. 1(c), which further demonstrates the epitaxial nature of the films even at the step edges.…”

“…Magnetite, Fe 3 O 4 , is an important transition metal oxide with a nearly fully spin polarized electron band at the Fermi level (half-metallic character) and a high Curie temperature of 858 K, which make it a promising candidate for room temperature spintronic devices and applications. [14][15][16] Recently, interesting magnetic and transport properties in epitaxial Fe 3 O 4 have been reported, i.e., magnetism in nanometerthick magnetite, 17 large orbital moment in nanoscale magnetite, 18 giant magnetization in nanometer-thick magnetite, 19 a spin Seebeck effect, 20 a spin filter effect, 21 electrical fieldinduced phase transition, [22][23][24] large transversal magnetoresitance (MR), 25,26 and spin valve effect. [27][28][29] However, initial efforts in exploiting its half metallic nature in magnetic tunnel junctions (MTJ) have been far from promising.…”

Thermoelectric performance of spin Seebeck effect in Fe3O4/Pt-based thin film heterostructures

“…38,39 These properties have inspired several studies of its magnetotransport properties. [40][41][42][43][44] Platinum is a material commonly used for spin current detection, due to its relatively large spin Hall angle. 45,46 The Fe 3 O 4 films were grown on magnesium oxide, MgO(001), substrates by pulsed laser deposition using a KrF excimer laser with 248 nm wavelength, 10 Hz repetition rate, and 3 × 10 9 W/cm 2 irradiance in an ultrahigh-vacuum chamber (UHV).…”

Temperature dependence of the spin Seebeck effect in [Fe3O4/Pt]n multilayers

“…Magnetite is a ferrimagnetic oxide with high Curie temperature and predicted half-metallic nature, commonly studied in spintronics. [33][34][35][36][37] Pt is used as the spin current detector, due to its relatively large spin Hall angle. 38,39 Despite Fe 3 O 4 being electrically conductive, it has been previously shown that the SSE dominates the thermoelectric response of the transversal voltage in Fe 3 O 4 /Pt system due to the fact that the electrical conductivity of magnetite is two orders of magnitude lower than that of Pt.…”