Abstract
Marked room-temperature ferromagnetism (RTFM) was obtained in carbon- and nitrogen-doped rutile \(\hbox {TiO}_2\) powders. X-ray photoelectron spectroscopy measurements revealed the co-existence of considerable densities of states near the Fermi level (\(E_{\rm F}\)) and oxygen vacancies primarily induced by C- and N-doping. Density functional theory calculations showed that the local moments responsible for the observed RTFM in N-doped \(\hbox {TiO}_2\) were primarily attributed to the partially populated, spin-polarized Ti \(3d\) band. In addition to the unfilled Ti \(3d\) band, the spin splitting in C \(2p\) states near \(E_{\rm F}\) in C-doped \(\hbox {TiO}_2\), which may be induced by the \(p-p\) interaction between the C impurities and neighboring oxygen ions, results in Stoner band-splitting-type ferromagnetism.
Similar content being viewed by others
References
T. Dietl, H. Ohno, F. Matsukura, J. Cibert, D. Ferrand, Science 287, 1019 (2000)
A. Zunger, S. Lany, H. Raebiger, Physics 3, 53 (2010). and references therein
C.F. Yu, T.J. Lin, S.J. Sun, H. Chou, J. Phys. D Appl. Phys. 40, 6497 (2007)
H. Pan, J.B. Yi, L. Shen, R.Q. Wu, J.H. Yang, J.Y. Lin, Y.P. Feng, J. Ding, L.H. Van, J.H. Yin, Phys. Rev. Lett. 99, 127201 (2007)
G. Drera, M.C. Mozzati, P. Galinetto, Y. Diaz-Fernandez, L. Malavasi, F. Bondino, M. Malvestuto, L. Sangaletti, Appl. Phys. Lett. 97, 012506 (2010)
N.N. Bao, H.M. Fan, J. Ding, J.B. Yi, J. Appl. Phys. 109, 07C302 (2011)
Q.Y. Wen, H.W. Zhang, Q.H. Yang, D.E. Gu, Y.X. Li, Y.L. Liu, J. Shen, J.Q. Xiao, IEEE Trans. Magn. 45, 4096 (2009)
L. Shen, R.Q. Wu, H. Pan, G.W. Peng, M. Yang, Z.D. Sha, Y.P. Feng, Phys. Rev. B 78, 073306 (2008)
K.S. Yang, Y. Dai, B.B. Huang, M.H. Whangbo, Appl. Phys. Lett. 93, 132507 (2008)
K.S. Yang, Y. Dai, B.B. Huang, M.H. Whangbo, J. Phys. Chem. C 113, 2624 (2009)
K.S. Yang, Y. Dai, B.B. Huang, J. Phys. Chem. C 114, 19830 (2010)
H. Peng, H.J. Xiang, S.H. Wei, S.S. Li, J.B. Xia, J. Li, Phys. Rev. Lett. 102, 017201 (2009)
J.A. Chan, S. Lany, A. Zunger, Phys. Rev. Lett. 103, 016404 (2009)
R.G. Palgrave, D.J. Payne, R.G. Egdell, J. Mater. Chem. 19, 8418 (2009)
C. Di Valentin, G. Pacchioni, A. Selloni, S. Livraghi, E. Giamello, J. Phys. Chem. B 109, 11414 (2005)
G. Tyuliev, S. Angelov, Appl. Surf. Sci. 32, 381 (1998)
M. Naeem, S.K. Hasanain, M. Kobayashi, Y. Ishida, A. Fujimori, S. Buzby, S.I. Shah, Nanotechnology 17, 2675 (2006)
C. Di Valentin, G. Pacchioni, A. Selloni, Phys. Rev. B 70, 085116 (2004)
A.K. Rumaiz, J.C. Woicik, E. Cockayne, H.Y. Lin, G.H. Jaffari, S.I. Shah, Appl. Phys. Lett. 95, 262111 (2009)
A.I. Boronin, V.I. Bukhityarov, A.L. Vishnevskii, G.K. Boreskov, V.I. Savchenko, Surf. Sci. 201, 195 (1988)
M.C. Biesinger, L.W.M. Lau, A.R. Gerson, RStC Smart, Appl. Surf. Sci. 257, 887 (2010)
J.M.D. Coey, M. Venkatesan, P. Stamenov, C.B. Fitzgerald, L.S. Dorneles, Phys. Rev. B 72, 024450 (2005)
J.H. Park, M.G. Kim, H.M. Jang, S. Ryu, Y.M. Kim, Appl. Phys. Lett. 84, 1338 (2004)
J.M.D. Coey, K. Wongsaprom, J. Alaria, M. Venkatesan, J. Phys. D Appl. Phys. 41, 134012 (2008)
K.E. Smith, J.L. Mackay, V.E. Henrich, Phys. Rev. B 35, 5822 (1987)
V.E. Henrich, P.A. Cox, The Surface Science of Metal Oxides, 1st edn. (Cambridge University Press, Cambridge, 1994)
E.C. Stoner, Proc. R. Soc. A 165, 372 (1938)
E.C. Stoner, Proc. R. Soc. A 169, 339 (1939)
G. Kresse, J. Furthmuller, Phys. Rev. B 54, 11169 (1996)
G. Kresse, J. Furthmuller, Comput. Mater. Sci. 6, 15 (1996)
J.P. Perdew, K. Burke, M. Ernzerhof, Phys. Rev. Lett. 77, 3865 (1996)
D. Vanderbilt, Phys. Rev. B 41, 7892 (1990)
C.J. Calzado, N.C. Hernandez, J.F. Sanz, Phys. Rev. B 77, 045118 (2008)
K.S. Yang, Y. Dai, B.B. Huang, Y.P. Feng, Phys. Rev. B 81, 033202 (2010)
K.S. Yang, Y. Dai, B.B. Huang, S.H. Han, J. Phys. Chem. B 110, 24011 (2006)
I. Slipukhina, Ph Mavropoulos, S. Blügel, M. Ležaić, Phys. Rev. Lett. 107, 137203 (2011)
Acknowledgments
This work was supported in part by the National Science Council of Taiwan, Republic of China under the Grant Nos. NSC98-2112-M-009-004-MY3, 101-2112-M-003-007, and MOE-ATP program operated at NCTU, Taiwan. The XPS measurements were performed at instruments center of National Chung Cheng University, Taiwan. We gratefully acknowledge the insightful comments from the members of the Solid State Laboratory at NCTU.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Wang, JB., Wu, KC., Mi, JW. et al. Room-temperature ferromagnetism in carbon- and nitrogen-doped rutile TiO2 . Appl. Phys. A 118, 725–731 (2015). https://doi.org/10.1007/s00339-014-8788-2
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00339-014-8788-2