Photoinduced Nanodots in Bi2Sr2CaCu2O8+d


Article Preview

We report a fabrication of high-density nanodots by photodoping in overdoped Bi2Sr2CaCu2O8+d thin film (Tc = 80 K). A scanning near-field optical microscope probe is used to locally excite carrier, and photodoped region is associated with lower Tc phase (Tc = 75 K) via overdoping. Nanoscale characterizations with optical reflectivity reveal that nanodots (30-nm diameter) are regularly distributed in 50-nm step. The resultant films with photoinduced nanodots enhance Jc, a situation being similar to strong pinning effects observed in films modified by either ion irradiation or sputtered nanoparticles. These results suggest that photoinduced nanodots with lower Tc act as effective pinning centers.



Edited by:

Keiichi Katayama, Kazumi Kato, Tadashi Takenaka, Masasuke Takata and Kazuo Shinozaki






M. Osada et al., "Photoinduced Nanodots in Bi2Sr2CaCu2O8+d", Key Engineering Materials, Vol. 320, pp. 167-170, 2006

Online since:

September 2006




[1] D. Larbalestier, A. Gurevich, D. Feldmann, A. Anatoly, Nature 414, 368 (2001).

[2] T. Matsushita, Supercond. Sci. Technol. 13, 730 (2000).

[3] L. Civale, A. D. Marwick, T. K. Worthington, M. A. Kirk, J. R. Thompson, L. Krusin-Elbaum, Y. Sun, J. R. Clem, F. Holtzberg, Phys. Rev. Lett. 67, 648 (1991).

DOI: 10.1103/physrevlett.67.648

[4] T. Haugan, P. N. Barnes, R. Wheeler, F. Meisenkothen, M. Sumption, Nature 430, 867 (2004).

[5] A. Crisan, S. Fujiwara, J. C. Nie, A. Sundaresan, H. Ihara, Appl. Phys. Lett. 79, 4547 (2001).

[6] V. I. Kudinov, I. L. Chaplygin, A. I. Kirilyuk, N. M. Kreines, R. Laiho, E. Laderanta, C. Ayache, Phys. Rev. B 47, 9017 (1993), and references cited therein.

[7] K. Tanabe, S. Karimoto, S. Kubo, K. Tsuru, M. Suzuki, Phys. Rev. B 52, R13152 (1995).

[8] A. Hoffmann, Ivan K. Schuller, Z. F. Ren, J. Y. Lao, J. H. Wang, Phys. Rev. B 56, 13742 (1997).

[9] M. Boekholt, V.V. Moshalkov, G. Guntherodt, Physica C 192, 191 (1992).

[10] R. M. S. Hybertse, L. F. Mattheiss, Phys. Rev. Lett. 60, 1661 (1988).

[11] I. Chong, Z. Hiroi, M. Izumi, J. Shimoyama, Y. Nakayama, K. Kishio, T. Terashima, Y. Bando, M. Takano, Science 276, 770 (1997). Corresponding author's e-mail address: osada. minoru@nims. go. jp Fax: 029-854-9061.

In order to see related information, you need to Login.