Role of the substrate on the magnetic anisotropy of magnetite thin films grown by ion-assisted deposition

Epitaxial integration of CoFe2O4 thin films on Si (001) surfaces using TiN buffer layers

“…In both samples, CFO_M and CFO_C, the yield value for silicon atoms is χ min (Si)≈ 60% and there is almost no channeling observed on Ti atoms from the TiN buffer layer. The χ min values of Si and Fe+Co signals are relatively larger when compared with those reported for other spinel oxide films such as magnetite grown on single crystal MgO substrates (χ min (Fe) ≈ 22-30% [40,41]. However, in our case the alignment of the CoFe 2 O 4 thin film with the Si (001) substrate takes place through a domain matching epitaxy instead of a lattice matching epitaxy.…”

“…These ratios increase at lower channel numbers indicating a higher defect density at the CoFe 2 O 4 /TiN interface. The loss of channeling at the interface has also been observed in other thin film materials such as SrTiO 3 deposited on TiN/Si(100) substrates [39] or Fe 3 O 4 deposited on different single crystal oxide substrates [40,41]. In order to compare both samples we have plotted on Fig.…”

Impact of Strain and Morphology on Magnetic Properties of Fe3O4/NiO Bilayers Grown on Nb:SrTiO3(001) and MgO(001)

“…While Kale et al observed a fourfold magnetic anisotropy with magnetic easy axes pointing into $〈110〉$ directions [75], magnetic easy axes aligned along the $〈100〉$ directions are presented in Refs. [35,76]. All these observations show that the magnetic properties of magnetite are highly affected by the interface between the film and substrate and can be influenced by the deposition conditions, lattice mismatch, or stoichiometric deviations.…”

“…For thin magnetite films on MgO(001), the magnetic easy axes are mostly reported to point into $〈110〉$ directions [70,73,74] as expected from bulk properties of Fe 3 O 4 . However, a magnetic isotropic behavior [74,75] or magnetic easy axes aligned in $〈100〉$ directions [76] are also presented in the literature for Fe 3 O 4 /MgO(001). Moreover, magnetite films grown on an iron buffer layer deposited on MgO(001) also exhibited a magnetic in-plane anisotropy with magnetic easy axes parallel to $〈100〉$ [77].…”

Evidence of anomalous switching of the in-plane magnetic easy axis with temperature in Fe3O4 film on SrTiO3:Nb by v-MOKE and ferromagnetic resonance

“…Diverse substrates have been reported in literature for the growth of Fe3O4 thin films [5,[10][11][12][13][14][15][16][17]. MgO is commonly used as a substrate because the O atoms form a facecentered cubic structure with a small lattice mismatch between the two materials of only 0.3%; this allows pseudomorphic growth causing tensile stress during an early stage of growth [12].…”