Interdiffusion study of magnesium in magnetite thin films grown on magnesium oxide (001) substrates

Abstract

Surface magnetic structure of epitaxial magnetite thin films grown on MgO(001) J. Appl. Phys. 105, 07D545 (2009); 10.1063/1.3089493 Structural and magnetic properties of magnetite-containing epitaxial iron oxide films grown on MgO(001) substrates J. Appl. Phys. 103, 043902 (2008); 10.1063/1.2840118 Study of interdiffusion between thin Y-Ba-Cu-O films and MgO substrates by applying Rutherford backscattering spectrometry combined with scanning tunneling microscopy Magnesium outdiffusion through magnetite films grown on magnesium oxide (001) (abstract)

Cu2O(110) formation on Co3O4(110) induced by copper impurity segregation

“…For example, the inverse spinel Fe 3 O 4 (0 0 1) surface undergoes a surface reconstruction to a p(1 × 4) surface when Ca and K segregate to the surface after prolonged heating at 990 K [57,58]. Similarly, when Fe 3 O 4 (0 0 1) thin fi lms were grown on a MgO substrate, a p(1 × 4) surface reconstruction was observed to result from Mg 2+ cations inter-diffusing throughout the iron oxide thin fi lm [59,60]. However, the Co 3 O 4 (1 1 0) surface is more energetical-ly stable than the Fe 3 O 4 (1 1 0) surface, which reconstructs with or without the presence of surface impurities, and the surface structure appears to be more robust.…”

EpitaxialZnxFe3−xO4thin films: A spintronic material with tunable electrical and magnetic properties

“…3 is the fact that the c axis lattice parameters of the Zn x Fe 3−x O 4 films grown in pure Ar atmosphere are larger than those of the films grown in an Ar/O 2 mixture and also show a slightly weaker increase with Zn content in the range 0 ≤ x ≤ 0.5. This most likely is caused by the formation of Fe vacancies when growing the films in finite oxygen partial pressure 20,23,24,25,26 . The presence of Fe vacancies can be viewed as an internal negative pressure effect leading to a reduced cell volume.…”

“…Thus, with increasing Zn substitution the electrical conductivity is reduced both by a reduction of the density of itinerant charge carriers and their hopping amplitude due to spin canting. Third, Fe vacancies can be introduced by preparing magnetite samples in excess oxygen 20,23,24,25,26 27 . Here, we report on the growth as well as the structural, magnetic and magnetotransport properties of epitaxial thin film samples of Zn x Fe 3−x O 4 with x = 0, 0.1, 0.33, 0.5, 0.9 deposited in different oxygen partial pressure.…”

Modifying magnetic properties of ultra-thin magnetite films by growth on Fe pre-covered MgO(001)

“…[19][20][21] However, lower temperatures than 250 C may lead to polycrystalline 22 and poorly ordered magnetite films. 23 During the preparation of MTJs, the material stacks are usually annealed to improve the crystalline quality of the barrier material and, therefore, increase the TMR.…”