Jpn. J. Appl. Phys. 51 (2012) 04DK08 (4 pages)  |Previous Article| |Next Article|  |Table of Contents|
|Full Text PDF (460K)| |Buy This Article|

Structural and Molecular Changes of C₆₀ Thin Films with Incorporated Magnesium Atoms

Crisóforo Morales, Nobuaki Kojima, Seiji Nishi, and Masafumi Yamaguchi

(Received September 27, 2011; accepted December 16, 2011; published online April 20, 2012)

Crystalline changes determined from the diffraction patterns of X-rays in C₆₀ films were observed when magnesium atoms were incorporated into C₆₀ films grown on mica substrates. The low full width at half maximum (FWHM) value for Mg-doped C₆₀ on the mica substrate indicates the high crystalline quality at low magnesium concentrations. Infrared modes that were initially inactive became active owing to the interaction of magnesium atoms with the C₆₀ molecule cage. The presence of the lines of triangular cyclic trimers suggests the presence of partially decomposed rhombohedral and rhombohedral polymers. Intermolecular bonds formed owing to the formation of polymeric phases in the film are responsible for the crystalline quality deterioration.

URL: http://jjap.jsap.jp/link?JJAP/51/04DK08/
DOI: 10.1143/JJAP.51.04DK08

References

1. J. Kido and T. Matsumoto: Appl. Phys. Lett. 73 (1998) 2866[AIP Scitation].
2. M. Pfeiffer, S. R. Forrest, K. Leo, and M. E. Thompson: Adv. Mater. 14 (2002) 1633[CrossRef].
3. C. J. Brabec, N. S. Sariciftci, and J. C. Hummelen: Adv. Funct. Mater. 11 (2001) 15.
4. P. Peumans, A. Yakimov, and S. R. Forrest: J. Appl. Phys. 93 (2003) 3693[AIP Scitation].
5. R. C. Haddon, A. F. Hebard, M. J. Rosseinsky, D. W. Murphy, S. J. Duclos, K. B. Lyons, B. Miller, J. M. Rosamilia, R. M. Fleming, A. R. Kortan, S. H. Glarum, A. V. Makhija, A. J. Muller, R. H. Eick, S. M. Zahurak, R. Tycko, G. Dabbagh, and F. A. Thiel: Nature 350 (1991) 320[CrossRef].
6. M. Chikamatsu, S. Kazaoui, N. Minami, K. Yase, T. Kodama, H. Nishikawa, I. Ikemoto, and K. Kikuchi: Mol. Cryst. Liq. Cryst. 377 (2002) 353.
7. Y. Chen, F. Stepniak, and J. H. Weaver: Phys. Rev. B 45 (1992) 8845[APS].
8. R. P. Gupta and M. Gupta: Physica C 219 (1994) 21[CrossRef].
9. T. Wagberg, P. Stenmark, and B. Sundqvist: J. Phys. Chem. Solids 65 (2004) 317[CrossRef].
10. M. C. Martin, X. Du, J. Kwon, and L. Mihaly: Phys. Rev. B 50 (1994) 173[APS].
11. S. Heguri and M. Kobayashi: Solid State Commun. 150 (2010) 1489[CrossRef].
12. Y. Iwasa, T. Arima, R. M. Fleming, T. Siegrist, O. Zhou, R. C. Haddon, L. J. Rothberg, K. B. Lyons, H. L. Carter, Jr., A. F. Hebard, R. Tycko, G. Dabbagh, J. J. Krajewski, G. A. Thomas, and T. Yagi: Science 264 (1994) 1570[Science].