Charge imbalance and magnetic properties at the Fe3O 4/BaTiO3 interface

Physical Review B - Condensed Matter and Materials Physics

Volumn 79, Issue 2, 2009, Pages

  Park, Min Sik ^a   Song, Jung Hwan ^a   Freeman, Arthur J ^a  

^a NORTHWESTERN UNIVERSITY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 59749096178     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.79.024420     Document Type: Article

References (35)

1. W. Eerenstein, N. D. Mathur, and J. F. Scott, Nature (London) 442, 759 (2006). 10.1038/nature05023
2. M. Ziese, A. Bollero, I. Panagiotopoulos, and N. Moutis, Appl. Phys. Lett. 88, 212502 (2006). 10.1063/1.2206121
3. D. J. Huang, C. F. Chang, H.-T. Jeng, G. Y. Guo, H.-J. Lin, W. B. Wu, H. C. Ku, A. Fujimori, Y. Takahashi, and C. T. Chen, Phys. Rev. Lett. 93, 077204 (2004). 10.1103/PhysRevLett.93.077204
4. A. R. West, Basic Solid State Chemistry, 2nd ed. (Wiley, New York, 1999).
5. E. Wimmer, H. Krakauer, M. Weinert, and A. J. Freeman, Phys. Rev. B 24, 864 (1981). 10.1103/PhysRevB.24.864
6. H. J. F. Jansen and A. J. Freeman, Phys. Rev. B 30, 561 (1984). 10.1103/PhysRevB.30.561
7. S. Picozzi, A. Continenza, and A. J. Freeman, J. Appl. Phys. 94, 4723 (2003). 10.1063/1.1608469
8. I. Galanakis, J. Phys.: Condens. Matter 16, 8007 (2004). 10.1088/0953-8984/16/45/022
9. Y. X. Chen, C. Chen, W. L. Zhow, Z. J. Wang, J. Tang, D. X. Wang, and J. M. Daughton, J. Appl. Phys. 95, 7282 (2004). 10.1063/1.1682788
10. S. D. Berry, D. M. Lind, G. Chern, and H. Mathias, J. Magn. Magn. Mater. 123, 126 (1993). 10.1016/0304-8853(93)90021-S
11. D. M. Lind, S. D. Berry, G. Chern, H. Mathias, and L. R. Testardi, J. Appl. Phys. 70, 6218 (1991). 10.1063/1.350000
12. M. Sohma, K. Kawaguchi, and T. Manago, J. Appl. Phys. 89, 2843 (2001). 10.1063/1.1337591
13. G. E. Sterbinsky, J. Cheng, P. T. Chiu, B. W. Wessels, and D. J. Keavney, J. Vac. Sci. Technol. B 25, 1389 (2007). 10.1116/1.2757185
14. H. F. Tian, T. L. Qu, L. B. Luo, J. J. Yang, S. M. Guo, H. Y. Zhang, Y. G. Zhao, and J. Q. Li, Appl. Phys. Lett. 92, 063507 (2008). 10.1063/1.2844858
15. H.-T. Jeng and G. Y. Guo, Phys. Rev. B 65, 094429 (2002). 10.1103/PhysRevB.65.094429
16. M. Friák, A. Schindlmayr, and M. Scheffler, New J. Phys. 9, 5 (2007). 10.1088/1367-2630/9/1/005
17. For the calculation of spin-polarization for carriers, we used the absolute value of [DOS (up-spin) -DOS (down-spin)] / [DOS (up-spin) +DOS (down-spin)] at EF.
18. L. Hedin and B. Lundqvist, J. Phys. C 4, 2064 (1971). 10.1088/0022-3719/4/14/022
19. We compared the results using the superlattice with a half unit cell of Fe3 O4 to the one unit cell, and obtained the same results of a ferrimagnetic metallic ground state and the same magnetic moments in both cases.
20. One and a half unit cells of BaTiO3 used in the superlattice are too thin to see the ferroelectric displacement of Ti ions, when it is in contact with the metal (Refs.). It is, however, enough to see the effects of charge imbalance, strain, and oxygen vacancies because they are independent of the thickness of the BaTiO3 slab in the superlattice.
21. When the interface configurations are considered in the [001] direction, the Fe2 O4 / TiO2 interface shows a much better match between the transition-metal cations (Fe and Ti ions) and the oxygen anions than does the Fe2 O4 /BaO interface.
22. O. Jepson and O. K. Anderson, Solid State Commun. 9, 1763 (1971). 10.1016/0038-1098(71)90313-9
23. P. E. Blöchl, O. Jepsen, and O. K. Andersen, Phys. Rev. B 49, 16223 (1994). 10.1103/PhysRevB.49.16223
24. A. Yanase and K. Siratori, J. Phys. Soc. Jpn. 53, 312 (1984). 10.1143/JPSJ.53.312
25. N. A. Hill, J. Phys. Chem. B 104, 6694 (2000). 10.1021/jp000114x
26. C.-G. Duan, S. S. Jaswal, and E. Y. Tsymbal, Phys. Rev. Lett. 97, 047201 (2006). 10.1103/PhysRevLett.97.047201
27. P. Mavropoulos, M. Ležaić, and S. Blügel, Phys. Rev. B 72, 174428 (2005). 10.1103/PhysRevB.72.174428
28. J. Junquera and P. Ghosez, Nature (London) 422, 506 (2003). 10.1038/nature01501
29. L. Kim, J. Kim, U. V. Waghmare, D. Jung, and J. Lee, Phys. Rev. B 72, 214121 (2005). 10.1103/PhysRevB.72.214121
30. O. Diéguez, K. M. Rabe, and D. Vanderbilt, Phys. Rev. B 72, 144101 (2005). 10.1103/PhysRevB.72.144101
31. In the supercell used in this work, the atom types Fe(I), Fe(II), Fe(III), and Fe(IV) have 2, 4, 1, and 1 Fe atoms, respectively.
32. A. Garcia and D. Vanderbilt, Appl. Phys. Lett. 72, 2981 (1998). 10.1063/1.121514
33. F. Millot and Y. Niu, J. Phys. Chem. Solids 58, 63 (1997). 10.1016/S0022-3697(96)00101-1
34. B. Stanka, W. Hebenstreit, U. Diebold, and S. A. Chambers, Surf. Sci. 448, 49 (2000). 10.1016/S0039-6028(99)01182-6
35. A. Subagyo and K. Sueoka, Jpn. J. Appl. Phys., Part 1 44, 5447 (2005). 10.1143/JJAP.44.5447