Data for: Magnetic-field-assisted molecular beam epitaxy: Engineering of Fe3O4 ultrathin films on MgO(111)

Molecular beam epitaxy is widely used for engineering low-dimensional materials. Here, we present a novel extension of the capabilities of this method by assisting epitaxial growth with the presence of an external magnetic field (MF). MF-assisted epitaxial growth was implemented under ultra-high vacuum conditions thanks to specialized sample holders for generating in-plane or out-of-plane MF and dedicated manipulator stations with heating and cooling options. The significant impact of MF on the magnetic properties was shown for ultra-thin epitaxial magnetite films grown on MgO(111). Using in situ and ex situ characterization methods, scanning tunneling microscopy, conversion electron Mössbauer spectroscopy, and the magneto-optic Kerr effect, we showed that the in-plane MF applied during the reactive deposition of 10 nm Fe3O4(111)/MgO(111) heterostructures influenced the growth morphology of the magnetite films, which affects both in-plane and out-of-plane characteristics of the magnetiz..., Conversion electron Moessbauer spectra (CEMS) were collected for ultrathin magnetite films.  Data are the source spectra presented in Figs 3 and 4:
Fig 3a ba_Fe3O4_1_graze.txt : Source data to Fig. 3a. CEMS spectrum of a 100 Å magnetite film measured in situ under ultrahigh vacuum.Fig 3b BA_Fe3O4_1_512.txt: Source data to Fig. 3b. CEMS spectrum of a 100 Å magnetite film measured ex situ after one months after exposure to the atmosphereFig 3c BA_Fe3O4_1_XII_2022.txt: Source data to Fig. 3c. CEMS spectrum of a 100 Å magnetite film measured ex situ, after six months after exposure to the atmosphere. Fig 4b ba_Fe3O4_5_bez_pola_512.txt: Source data to Fig. 4b. CEMS spectrum for the 10 nm Fe3O4(111) film on MgO(111) deposited with no-field.Fig 4c ba_fe3o4__6_512.txt: Source data to Fig. 4c. CEMS spectrum for the 10 nm Fe3O4(111) film on MgO(111) deposited in-field.,