Skip to main content Accessibility help

Molecular beam epitaxy growth of Sr1-x K x Fe2As2 and Ba1-x K x Fe2As2

  • Michio Naito (a1) (a2), Shinya Ueda (a1) (a2), Soichiro Takeda (a1) (a2), Shiro Takano (a1) (a2) and Akihiro Mitsuda (a3)...


Single-crystalline films of superconducting Sr1-x K x Fe2As and Ba1-x K x Fe2As2 were grown by molecular beam epitaxy (MBE). The most crucial problem in MBE growth of these compounds is the high volatility of elemental K. The key to incorporating K into films is low-temperature growth (≤ 350 ºC) in reduced As flux. We performed a systematic study of the doping dependence of T c in Ba1-x K x Fe2As2 for x = 0.0 to 1.0. The highest T c on (T c end) so far attained for Ba1-x K x Fe2As2 is 38.3 K (35.5 K) at x ~ 0.3.



Hide All
1. Kamihara, Y., Watanabe, T., Hirano, M., and Hosono, H., J. Am. Chem. Soc. 130 (2008) 3296.
2. Johrendt, D. and Pottgen, R., Physica C 469 (2009) 332.
3. Lv, B., Gooch, M., Lorenz, B., Chen, F., Guloy, A. M., and Chu, C. W., New J. Phys. 11 (2009) 025013.
4. Lee, N. H., Jung, S. -G., Kim, D. H., and Kang, W. N.: Appl. Phys. Lett. 96 (2010) 202505.
5. Takeda, S., Ueda, S., Yamagishi, T., Agatsuma, S., Takano, S., Mitsuda, A., and Naito, M., Appl. Phys. Express 3 (2010) 093101.
6. Yamagishi, T., Ueda, S., Takeda, S., Takano, S., Mitsuda, A., and Naito, M., Physica C 471 (2011) 1177.
7. The trend lines are as follows: c 0 = 0.8132x + 13.062 for Ba1- x K x Fe2As2 after ref. [2] and c 0 = 1.4656x + 12.364 for Sr1- x K x Fe2As2 after ref. [3].
8. Chen, H., Ren, Y., Qiu, Y., Bao, W., Liu, R. H., Wu, G., Wu, T., Xie, Y. L., Wang, X. F., Huang, Q., and Chen, X. H., Europhys. Lett. 85 (2009) 17006.



Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed