Magnetic tunnel junctions with Co:TiO2 magnetic semiconductor electrodes

IEEE Transactions on Magnetics

Volumn 46, Issue 6, 2010, Pages 1683-1686

  Lee, Y J ^a   Kumar, A ^a   Vera Marun, I J ^a   De Jong, M P ^a   Jansen, R ^a  

^a UNIVERSITY OF TWENTE   (Netherlands)

Author keywords

Cobalt doped TiO2La0.67Sr0.33MnO 3; Magnetic semiconductor; Magnetic tunnel junction; Spintronics

Indexed keywords

FERROMAGNETISM; MAGNETIC DEVICES; MAGNETIC SEMICONDUCTORS; OXIDE MINERALS; OXIDE SEMICONDUCTORS; SPINTRONICS; TITANIUM DIOXIDE; TUNNEL JUNCTIONS; TUNNELLING MAGNETORESISTANCE;

JUNCTION RESISTANCES; MAGNETIC TUNNEL JUNCTION; METALLIC IMPURITY; PARAMAGNETIC INSULATOR; ROOM TEMPERATURE FERROMAGNETISM; SEMICONDUCTOR ELECTRODE; SPIN-POLARIZED TUNNELING; TUNNEL MAGNETORESISTANCE;

SEMICONDUCTOR JUNCTIONS;

EID: 77952841769     PISSN: 00189464     EISSN: None     Source Type: Journal    
DOI: 10.1109/TMAG.2010.2046019     Document Type: Article

References (18)

1. T. Dietl, H. Ohno, F. Matsukura, J. Cibert, and D. Ferrand, "Zener model description of ferromagnetism in zinc-blende magnetic semiconductors, " Science, vol.287, p. 1019, 2000.
2. J. M. D. Coey, M. Venkatesan, and C. B. Fitzgerald, "Donor impurity band exchange in dilute ferromagnetic oxides," Nature. Mater., vol.4, p. 173, 2005.
3. J. W. Quilty, A. Shibata, J.-Y. Son, K. Takubo, T. Mizokawa, H. Toyosaki, T. Fukumura, and M. Kawasaki Signature of carrier-induced ferromagnetism in Ti Co O: Exchange interaction between high-spin Co and the Ti 3d conduction band," Phys. Rev. Lett., vol.96, p. 027202, 2006.
4. S. A. Chambers, "Ferromagnetism in doped thin-film oxide and nitride semiconductors and dielectrics," Surf. Sci. Rep., vol.61, p. 345, 2006.
5. Y. Matsumoto, M. Murakami, T. Shono, T. Hasegawa, T. Fukumura, M. Kawasaki, P. Ahmet, T. Chikyow, S. Koshihara, and H. Koinuma Room-temperature ferromagnetism in transparent transition metal-doped titanium dioxide," Science, vol.291, p. 854, 2001.
6. H. Toyosaki, T. Fukumura, Y. Yamada, K. Nakajima, T. Chikyow, T. Hasegawa, H. Koinuma, and M. Kawasaki, "Anomalous Hall effect governed by electron doping in a room-temperature transparent ferromagnetic semiconductor," Nature. Mater., vol.3, p. 221, 2004.
7. R. Ramaneti, J. C. Lodder, and R. Jansen, "Anomalous Hall effect in anatase Co:TiO ferromagnetic semiconductor," Appl. Phys. Lett., vol.91, p. 012502, 2007.
8. Y. Hirose, T. Hitosugi, Y. Furubayashi, G. Kinoda, K. Inaba, T. Shimada, and T. Hasegawa, "Intrinsic Faraday spectra of ferromagnetic rutile Ti Co O ," Appl. Phys. Lett., vol.88, p. 252508, 2006.
9. R. Ramaneti, J. C. Lodder, and R. Jansen, "Kondo effect and impurity band conduction in Co:TiO magnetic semiconductor," Phys. Rev. B, vol.76, p. 195207, 2007.
10. H. Toyosaki, T. Fukumura, K. Ueno, M. Nakano, and M. Kawasaki, "A ferromagnetic oxide semiconductor as spin injection electrode in magnetic tunnel junction," Jpn. J. Appl. Phys., vol.44, pt. 2, p. L896, 2005.
11. I. J. Vera Marún, F. M. Postma, J. C. Lodder, and R. Jansen, "Tunneling magnetoresistance with positive and negative sign in La Sr MnO SrTiO Co junctions," Phys. Rev. B, vol.76, p. 064426, 2007.
12. G. Koster, B. L. Kropman, G. J. H. M. Rijnders, D. H. A. Blank, and H. Rogalla, "Quasi-ideal strontium titanate crystal surfaces through formation of strontium hydroxide," Appl. Phys. Lett., vol.73, p. 2920, 1998.
13. J. S. Moodera, L. R. Kinder, J. Nowak, P. LeClair, and R. Meservey, "Geometrically enhanced magnetoresistance in ferromagnet- insulatorferromagnet tunnel junctions," Appl. Phys. Lett., vol.69, p. 708, 1996.
14. J. M. De Teresa, A. Barthelemy, A. Fert, J. P. Contour, R. Lyonnet, F. Montaigne, P. Seneor, and A. Vaures Inverse tunnel magnetoresistance in Co/SrTiO La Sr MnO: New ideas on spin-polarized tunneling," Phys. Rev. Lett., vol.82, p. 4288, 1999.
15. J. Z. Sun, K. P. Roche, and S. S. P. Parkin, "Interface stability in hybrid metal-oxide magnetic trilayer junctions," Phys. Rev. B, vol.61, p. 11244, 2000.
16. M. Viret, M. Drouet, J. Nassar, J. P. Contour, C. Fermon, and A. Fert, "Low-field colossal magnetoresistance in manganite tunnel spin valves," Europhys. Lett., vol.39, p. 545, 1997.
17. R. Jansen and J. S. Moodera, "Influence of barrier impurities on the magnetoresistance in ferromagnetic tunnel junctions," J. Appl. Phys., vol.83, p. 6682, 1998.
18. R. Jansen and J. S. Moodera, "Magnetoresistance in doped magnetic tunnel junctions: Effect of spin scattering and impurity-assisted transport," Phys. Rev. B, vol.61, p. 9047, 2000.