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Fe3O4/MgO Superlattices Grown on MgO(OOl) and Fe/MgO(001) by Molecular Beam Epitaxy

Published online by Cambridge University Press:  15 February 2011

G. Chern ,
C. L. Chang  and
Y. R. Chean
G. Chern
Affiliation:
Department of Physics, National Chung-Cheng University, Chia-Yi, Taiwan
C. L. Chang
Affiliation:
Department of Physics, Tamkang University, Tamsui, Taiwan
Y. R. Chean
Affiliation:
Department of Physics, National Chung-Cheng University, Chia-Yi, Taiwan
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Abstract

The growth and structural characterization of Fe3O4/MgO superlattices on MgO(001) and Fe-coated MgO(001) are compared. Long modulated coherence and sharp interface are revealed by X-ray diffraction and reflection high energy electron diffraction (RHEED). For the superlattice grown directly on MgO(001), high crystalline quality is comparable to the previous report on the oxide superlattice system. For the superlattice grown on Fe/MgO(001), both chemical and lattice spacing modulations are maintained which is different from the polycrystlline structure of the Fe3O4/NiO grown on Ni-based system. This superiority of the growth on Fe-coated surface results from both the smaller lattice mismatch and the oxidation state of Fe relative to MgO. The changes of the RHEED intensity during the growth of these superlattices are also measured. The evolution of the oxide interface during the growth of Fe3O4/MgO is quantitatively presented.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 474: Symposium L – Epitaxial Oxide Thin Films III , 1997 , 271
Copyright
Copyright © Materials Research Society 1997

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References

REFERENCES

1. Chern, G., Berry, S.D., Mathias, H. and Testardi, L.R., Phys. Rev. Lett. 68, 114 (1992).Google Scholar
2. Chern, G., Berry, S.D., Lind, D.M., Mathias, H. and Testardi, L.R., Phys. Rev. B45, 3644 (1992).Google Scholar
3. Smathers, J.B. and Testardi, L.R., Phys. Rev. Lett. 77, 1147 (1996).Google Scholar
4. Terashima, T. and Bando, Y., Thisn Solid Films 152, 455 (1987).Google Scholar
5. Lind, D.M., Berry, S.D.. Chern, G., Mathias, H. and Testardi, L.R., Phys. Rev. B 45, 1838 (1992).Google Scholar
6. Wolf, R.M., De Veiman, A.E.M., van der Sluis, P., van der Zaag, P.J. and van de Stegge, J.B.F, Mat. Res. Soc. Symp. Proc. 341, 23 (1994).Google Scholar
7. Magnetically, this system is also attractive. Since MgO does not have magnetic ordering, a true low-dimensional state of ferrimagnetic ordering can be approached by reducing the thickness of FeβCty (with fixed MgO). A reduced Tc down to ∼200 K (from bulk value -850K) has been observed when the Fe3O4 layer thickness Å.Google Scholar
8. Neave, J.H., Joyce, B.A., Dobson, P.J. and Norton, N., Appl. Phys. A 31, 1 (1983).Google Scholar
9. Van Hove, J.M., Lent, C.S., Pukite, P.R. and Cohen, P.I., J. Vac. Sci. Technol. B1, 741 (1983).Google Scholar
10. Chern, Gung and Chean, Yo Ren, Jpn. J. Appl. Phys. (To appear in May).Google Scholar
11. Henrich, Victor E. and Cox, P.A., in The Surface Science of Metal Oxides (Cambridge University Press 1994), p. 221.Google Scholar